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NAME

       UIL -- The user interface language file format

SYNOPSIS

       MODULE module_name
       [ NAMES = CASE_INSENSITIVE | CASE_SENSITIVE ]
       [ CHARACTER_SET = character_set ]
       [ OBJECTS = { widget_name = GADGET | WIDGET; [...] } ]
       { [
       [ value_section ] |
       [ procedure_section ] |
       [ list_section ] |
       [ object_section ] |
       [ identifier_section ]
       [ ... ]
       ] }
       END MODULE;

DESCRIPTION

       The  UIL  language  is  used for describing the initial state of a user
       interface for a widget based application.  UIL  describes  the  widgets
       used  in  the  interface,  the  resources  of  those  widgets,  and the
       callbacks of those widgets. The UIL file is compiled into  a  UID  file
       using  the  command uil or by the callable compiler Uil(). The contents
       of the compiled UID file can then be  accessed  by  the  various  Motif
       Resource Management (MRM) functions from within an application program.

       The  UID file is independent of the platform on which the Motif program
       will eventually be run. In other words, the same UID file can  be  used
       on any system that can run Motif.

   File
       A  UIL  file  consists  of  a  single complete module, described in the
       syntax description above, or, if the file is to be included in a larger
       UIL  file,  one  complete  "section," as described below. UIL uses five
       different kinds  of  sections:  value,  procedure,  list,  object,  and
       identifier.

       UIL is a free-form language. This means that high-level constructs such
       as object and value declarations do not need to begin in any particular
       column  and  can span any number of lines. Low-level constructs such as
       keywords and punctuation characters  can  also  begin  in  any  column;
       however,  except  for  string  literals  and comments, they cannot span
       lines.

       The UIL compiler accepts input lines up to 132 characters in length.

       MODULE module_name
                 The name by which the UIL module is known in  the  UID  file.
                 This  name  is  stored  in  the UID file for later use in the
                 retrieval of resources by  the  MRM.   This  name  is  always
                 stored in uppercase in the UID file.

       NAMES = CASE_INSENSITIVE | CASE_SENSITIVE

                 Indicates  whether  names should be treated as case sensitive
                 or case insensitive. The  default  is  case  sensitive.   The
                 case-sensitivity  clause  should  be  the first clause in the
                 module header, and in any case  must  precede  any  statement
                 that  contains  a name.  If names are case sensitive in a UIL
                 module, UIL keywords in that module  must  be  in  lowercase.
                 Each  name  is  stored in the UIL file in the same case as it
                 appears in the UIL module.  If names  are  case  insensitive,
                 then  keywords can be in uppercase, lowercase, or mixed case,
                 and the uppercase equivalent of each name is  stored  in  the
                 UID file.

       CHARACTER_SET = character_set

                 Specifies  the  default  character set for string literals in
                 the module that do not explicitly set  their  character  set.
                 The  default  character set, in the absence of this clause is
                 the codeset component of the LANG  environment  variable,  or
                 the  value of XmFALLBACK_CHARSET if LANG is not set or has no
                 codeset  component.   The  value  of  XmFALLBACK_CHARSET   is
                 defined  by  the  UIL  supplier,  but  is  usually  ISO8859-1
                 (equivalent to ISO_LATIN1).  Use of this clause turns off all
                 localized string literal processing turned on by the compiler
                 flag  -s  or  the  Uil_command_type  data  structure  element
                 use_setlocale_flag.

       OBJECTS = { widget_name = GADGET | WIDGET; }

                 Indicates  whether  the  widget or gadget form of the control
                 specified by widget_name is used by default.  By default  the
                 widget  form  is  used,  so the gadget keyword is usually the
                 only one used.  The specified control should be one that  has
                 both  a  widget and gadget version: XmCascadeButton, XmLabel,
                 XmPushButton, XmSeparator, and XmToggleButton.  The  form  of
                 more  than  one  control  can be specified by delimiting them
                 with semicolons.  The gadget or widget form of an instance of
                 a  control  can  be  specified  with  the  GADGET  and WIDGET
                 keywords in a particular object declaration.

       value_section
                 Provides a way to name a value expression  or  literal.   The
                 value name can then be referred to by declarations that occur
                 elsewhere in the UIL module in any context where a value  can
                 be  used.   Values can be forward referenced.  Value sections
                 are described in more detail later in the reference page.

       procedure_section
                 Defines the callback  routines  used  by  a  widget  and  the
                 creation routines for user-defined widgets. These definitions
                 are  used  for  error  checking.   Procedure   sections   are
                 described in more detail later in the reference page.

       list_section
                 Provides a way to group together a set of arguments, controls
                 (children), callbacks, or procedures for later use in the UIL
                 module.   Lists  can contain other lists, so that you can set
                 up a hierarchy to clearly  show  which  arguments,  controls,
                 callbacks,  and procedures are common to which widgets.  List
                 sections are described in more detail later in the  reference
                 page.

       object_section
                 Defines  the  objects  that make up the user interface of the
                 application.   You  can  reference  the   object   names   in
                 declarations  that  occur  elsewhere in the UIL module in any
                 context where an object name can be used (for example,  in  a
                 controls  list, as a symbolic reference to a widget ID, or as
                 the tag_value argument for a  callback  procedure).   Objects
                 can  be forward referenced.  Object sections are described in
                 more detail later in the reference page.

       identifier_section
                 Defines a run-time binding of data to names  that  appear  in
                 the  UIL  module.   Identifier sections are described in more
                 detail later in the reference page.

       The UIL file can also contain comments and  include  directives,  which
       are  described  along  with the main elements of the UIL file format in
       the following sections.

   Comments
       Comments can take one of two forms, as follows:

          o  The comment is introduced with the sequence /*  followed  by  the
             text  of  the  comment and terminated with the sequence */.  This
             form of comment can span multiple source lines.

          o  The comment is introduced with an ! (exclamation point), followed
             by  the  text  of  the  comment  and terminated by the end of the
             source line.

       Neither form of comment can be nested.

   Value sections
       A value section consists of the keyword VALUE followed by a sequence of
       value declarations. It has the following syntax:

       VALUE  value_name  : [ EXPORTED | PRIVATE ] value_expression | IMPORTED
       value_type ;

       Where value_expression is assigned to value_name  or  a  value_type  is
       assigned to an imported value name.  A value declaration provides a way
       to name a value expression or literal.  The value name can be  referred
       to  by  declarations  that occur later in the UIL module in any context
       where a value can be used.  Values can be forward referenced.

       EXPORTED  A value that you define as exported is stored in the UID file
                 as  a named resource, and therefore can be referenced by name
                 in other UID files. When you define a value as exported,  MRM
                 looks  outside  the  module  in  which  the exported value is
                 declared to get its value at run time.

       PRIVATE   A private value is a value that is not imported or  exported.
                 A  value  that  you  define  as  private  is  not stored as a
                 distinct resource in the  UID  file.   You  can  reference  a
                 private  value  only  in  the UIL module containing the value
                 declaration. The value or  object  is  directly  incorporated
                 into   anything   in  the  UIL  module  that  references  the
                 declaration.

       IMPORTED  A value that you define as imported is one that is defined as
                 a named resource in a UID file. MRM resolves this declaration
                 with the corresponding exported  declaration  at  application
                 run time.

       By default, values and objects are private.  The following is a list of
       the supported value types in UIL:

          o  ANY

          o  ARGUMENT

          o  BOOLEAN

          o  COLOR

          o  COLOR_TABLE

          o  COMPOUND_STRING

          o  FLOAT

          o  FONT

          o  FONT_TABLE

          o  FONTSET

          o  ICON

          o  INTEGER

          o  INTEGER_TABLE

          o  KEYSYM

          o  REASON

          o  SINGLE_FLOAT

          o  STRING

          o  STRING_TABLE

          o  TRANSLATION_TABLE

          o  WIDE_CHARACTER

          o  WIDGET

   Procedure sections
       A procedure section consists of the keyword  PROCEDURE  followed  by  a
       sequence of procedure declarations. It has the following syntax:

       PROCEDURE
            procedure_name [ ( [ value_type ]) ];

       Use a procedure declaration to declare

          o  A routine that can be used as a callback routine for a widget

          o  The creation function for a user-defined widget

       You  can reference a procedure name in declarations that occur later in
       the UIL module in any context where a procedure can be used. Procedures
       can  be  forward referenced.  You cannot use a name you used in another
       context as a procedure name.

       In a procedure declaration, you have the option of  specifying  that  a
       parameter  will  be passed to the corresponding callback routine at run
       time. This parameter is called the callback tag. You  can  specify  the
       data  type  of the callback tag by putting the data type in parentheses
       following the procedure name. When you  compile  the  module,  the  UIL
       compiler  checks  that  the  argument  you specify in references to the
       procedure is of this type. Note that the data type of the callback  tag
       must  be  one  of  the valid UIL data types.  You can use a widget as a
       callback tag, as long as the widget  is  defined  in  the  same  widget
       hierarchy  as the callback, that is they have a common ancestor that is
       in the same UIL hierarchy.

       The following list summarizes how the UIL compiler checks argument type
       and argument count, depending on the procedure declaration.

       No parameters
                 No  argument type or argument count checking occurs.  You can
                 supply either 0 or one arguments in the procedure reference.

       ( )       Checks that the argument count is 0 (zero).

       (ANY)     Checks that the argument count  is  1.  Does  not  check  the
                 argument  type.  Use the ANY type to prevent type checking on
                 procedure tags.

       (type)    Checks for one argument of the specified type.

       (class_name)
                 Checks for one widget argument of the specified widget class.

       While it is possible to use any UIL data type to specify the type of  a
       tag in a procedure declaration, you must be able to represent that data
       type in the programming language you are using. Some data  types  (such
       as  integer,  Boolean,  and string) are common data types recognized by
       most programming languages.  Other  UIL  data  types  (such  as  string
       tables)  are  more  complicated  and  may  require  that  you set up an
       appropriate corresponding data structure in the application in order to
       pass a tag of that type to a callback routine.

       You  can  also  use  a  procedure  declaration  to specify the creation
       function for a user-defined widget. In this case, you specify no formal
       parameters.  The procedure is invoked with the standard three arguments
       passed to all  widget  creation  functions.   (See  the  Motif  Toolkit
       documentation for more information about widget creation functions.)

   List sections
       A  list  section consists of the keyword LIST followed by a sequence of
       list declarations. It has the following syntax:

       LIST
            list_name: { list_item; [...] }
            [...]

       You can also use list sections to group together a  set  of  arguments,
       controls  (children), callbacks, or procedures for later use in the UIL
       module. Lists can contain other  lists,  so  that  you  can  set  up  a
       hierarchy  to  clearly  show  which arguments, controls, callbacks, and
       procedures are common to which widgets.  You cannot mix  the  different
       types of lists; a list of a particular type cannot contain entries of a
       different list type or reference the name of a different list type.   A
       list  name is always private to the UIL module in which you declare the
       list and cannot be stored as a named resource in a UID file.

       The additional list types are described in the following sections.

       Arguments List Structure

       An arguments list defines which arguments are to be  specified  in  the
       arguments  list  parameter  when  the creation routine for a particular
       object is called at run time.  An arguments  list  also  specifies  the
       values for those arguments.  Argument lists have the following syntax:

       LIST
            list_name: ARGUMENTS {
                 argument_name = value_expression;
                 [...] }
       [...]

       The  argument  name  must be either a built-in argument name or a user-
       defined argument name that is specified with the ARGUMENT function.

       If you use a built-in argument name as an arguments list  entry  in  an
       object definition, the UIL compiler checks the argument name to be sure
       that it is supported by the type of object that you  are  defining.  If
       the  same  argument  name  appears  more than once in a given arguments
       list, the last entry  that  uses  that  argument  name  supersedes  all
       previous entries with that name, and the compiler issues a message.

       Some  arguments,  such as XmNitems and XmNitemCount, are coupled by the
       UIL compiler.  When you specify one of the arguments, the compiler also
       sets the other. The coupled argument is not available to you.

       The  Motif  Toolkit  and  the X Toolkit (intrinsics) support constraint
       arguments.  A constraint argument is one that is passed to children  of
       an object, beyond those arguments normally available.  For example, the
       Form widget grants a set  of  constraint  arguments  to  its  children.
       These arguments control the position of the children within the Form.

       Unlike  the  arguments  used  to  define the attributes of a particular
       widget, constraint arguments are used exclusively to define  additional
       attributes  of  the  children of a particular widget.  These attributes
       affect the behavior of the children within  their  parent.   To  supply
       constraint  arguments to the children, you include the arguments in the
       arguments list for the child.

       See Appendix B for information about which arguments are  supported  by
       which  widgets.  See  Appendix  C  for information about what the valid
       value type is for each built-in argument.

       Callbacks List Structure

       Use a callbacks list  to  define  which  callback  reasons  are  to  be
       processed  by a particular widget at run time.  Callback lists have the
       following syntax:

       LIST list_name : CALLBACKS { reason_name = PROCEDURE procedure_name [ (
       [  value_expression  ]  )  ];  | reason_name = procedure_list ; [...] }
       [...]

       For Motif Toolkit widgets, the reason name must be  a  built-in  reason
       name.  For  a  user-defined  widget, you can use a reason name that you
       previously specified using the REASON function.  If you use a  built-in
       reason in an object definition, the UIL compiler ensures that reason is
       supported by the type of object you  are  defining.  Appendix  B  shows
       which reasons each object supports.

       If the same reason appears more than once in a callbacks list, the last
       entry referring to that name supersedes all previous entries using  the
       same reason, and the UIL compiler issues a diagnostic message.

       If you specify a named value for the procedure argument (callback tag),
       the data type of the value  must  match  the  type  specified  for  the
       callback   tag   in  the  corresponding  procedure  declaration.   When
       specifying a widget name as a procedure value expression you must  also
       specify  the  type  of  the  widget  and a space before the name of the
       widget.

       Because the UIL compiler produces a UID  file  rather  than  an  object
       module  (.o),  the  binding of the UIL name to the address of the entry
       point to the procedure is not done by the loader, but is established at
       run  time  with  the  MRM  function  MrmRegisterNames.   You  call this
       function before fetching any objects, giving it both the UIL names  and
       the  procedure  addresses  of each callback. The name you register with
       MRM in the application program must match the name  you  specified  for
       the procedure in the UIL module.

       Each  callback  procedure  receives  three  arguments.  The  first  two
       arguments have the same form for each callback. The form of  the  third
       argument varies from object to object.

       The  first  argument is the address of the data structure maintained by
       the Motif Toolkit for this object instance. This address is called  the
       widget ID for this object.

       The  second  argument  is the address of the value you specified in the
       callbacks list for this procedure. If you do not specify  an  argument,
       the  address  is  NULL.   Note  that,  in  the case where the value you
       specified is a string or  an  XmString,  the  value  specified  in  the
       callbacks  list  already  represents  an  address rather than an actual
       value. In the case of a simple string, for example, the  value  is  the
       address of the first character of that string. In these cases, UIL does
       not add a level of indirection, and the second argument to the callback
       procedure is simply the value as specified in the callbacks list.

       The  third  argument  is the reason name you specified in the callbacks
       list.

       Controls List Structure

       A controls list defines which objects are children  of,  or  controlled
       by,  a  particular  object.   Each  entry  in  a  controls list has the
       following syntax:

       LIST
            list_name: CONTROLS {
                 [child_name: ] [MANAGED | UNMANAGED] object_definition;
                 [...] }
            [...]

       If you specify the keyword MANAGED at run time, the object  is  created
       and  managed;  if you specify UNMANAGED at run time, the object is only
       created.  Objects are managed by default.

       You can use child_name  to  specify  resources  for  the  automatically
       created  children  of  a  particular  control.  Names for automatically
       created children are formed by appending Xm_ to the name of  the  child
       widget.   This  name  is  specified in the documentation for the parent
       widget.

       Unlike the arguments list and the callbacks list, a controls list entry
       that  is  identical to a previous entry does not supersede the previous
       entry. At run time, each controls list  entry  causes  a  child  to  be
       created  when  the  parent is created. If the same object definition is
       used for multiple children, multiple instances of the child are created
       at  run  time.   See Appendix B for a list of which widget types can be
       controlled by which other widget types.

       Procedures List Structure

       You can specify multiple procedures for a callback  reason  in  UIL  by
       defining  a  procedures list. Just as with other list types, procedures
       lists can be defined in-line or in a list  section  and  referenced  by
       name.

       If  you define a reason more than once (for example, when the reason is
       defined both in a referenced procedures list and in the callbacks  list
       for  the  object),  previous  definitions  are overridden by the latest
       definition.  The syntax for a procedures list is as follows:

       LIST
            list_name: PROCEDURES {
                 procedure_name [ ( [ value_expression ]) ];
                 [...] }
            [...]

       When specifying a widget name as a procedure value expression you  must
       also  specify the type of the widget and a space before the name of the
       widget.

   Object Sections
       An object section consists of the keyword OBJECT followed by a sequence
       of object declarations. It has the following syntax:

       OBJECT object_name:
            [ EXPORTED | PRIVATE | IMPORTED ] object_type
                 [ PROCEDURE creation_function ]
                 [ object_name [ WIDGET | GADGET ] | {list_definitions } ]

       Use  an  object declaration to define the objects that are to be stored
       in the UID file. You can reference the object name in declarations that
       occur  elsewhere  in the UIL module in any context where an object name
       can be used (for example, in a controls list, as a  symbolic  reference
       to a widget ID, or as the tag_value argument for a callback procedure).
       Objects can be forward referenced; that is, you can declare  an  object
       name  after  you reference it. All references to an object name must be
       consistent with the type of the object,  as  specified  in  the  object
       declaration.   You  can  specify  an  object  as exported, imported, or
       private.

       The object definition can contain a sequence of lists that  define  the
       arguments,  hierarchy,  and  callbacks for the widget.  You can specify
       only one list of each type for an object.  When  you  declare  a  user-
       defined  widget,  you  must  include a reference to the widget creation
       function for the user-defined widget.

       Note: Several widgets in the Motif  Toolkit  actually  consist  of  two
       linked  widgets.  For  example,  XmScrolledText and XmScrolledList each
       consist of children XmText and XmList widgets under a  XmScrolledWindow
       widget.  When  such a widget is created, its resources are available to
       both of the underlying widgets. This can occasionally  cause  problems,
       as  when the programmer wants a XmNdestroyCallback routine named to act
       when the widget is destroyed. In this case, the callback resource  will
       be  available  to  both  sub-widgets,  and will cause an error when the
       widget is destroyed. To avoid these  problems,  the  programmer  should
       separately  create the parent and child widgets, rather than relying on
       these linked widgets.

       Use the GADGET or WIDGET keyword to  specify  the  object  type  or  to
       override  the  default  variant  for this object type.  You can use the
       Motif Toolkit name of an object type that has  a  gadget  variant  (for
       example,  XmLabelGadget) as an attribute of an object declaration.  The
       object_type can be any object type, including  gadgets.   You  need  to
       specify  the  GADGET  or  WIDGET  keyword only in the declaration of an
       object, not when you reference  the  object.  You  cannot  specify  the
       GADGET  or  WIDGET  keyword  for  a  user-defined  object; user-defined
       objects are always widgets.

   Identifier sections
       The identifier section allows you to define an identifier, a  mechanism
       that  achieves  run-time  binding of data to names that appear in a UIL
       module.  The  identifier  section  consists  of  the  reserved  keyword
       IDENTIFIER,  followed  by  a  list  of  names,  each name followed by a
       semicolon.

       IDENTIFIER identifier_name; [...;]

       You can later use these names in the UIL module as either the value  of
       an  argument  to  a widget or the tag value to a callback procedure. At
       run  time,   you   use   the   MRM   functions   MrmRegisterNames   and
       MrmRegisterNamesInHierarchy  to  bind the identifier name with the data
       (or, in the case of callbacks, with the address of the data) associated
       with the identifier.

       Each  UIL  module  has a single name space; therefore, you cannot use a
       name you used for a value, object, or procedure as an  identifier  name
       in the same module.

       The  UIL  compiler  does  not  do  any  type  checking  on  the  use of
       identifiers in a UIL module. Unlike a UIL value, an identifier does not
       have  a UIL type associated with it. Regardless of what particular type
       a widget argument or callback procedure tag is defined to be,  you  can
       use   an  identifier  in  that  context  instead  of  a  value  of  the
       corresponding type.

       To reference these identifier names in a UIL module, you use  the  name
       of the identifier wherever you want its value to be used.

   Include directives
       The  include  directive  incorporates  the contents of a specified file
       into a UIL module. This mechanism allows several UIL modules  to  share
       common definitions. The syntax for the include directive is as follows:

       INCLUDE FILE file_name;

       The  UIL  compiler  replaces the include directive with the contents of
       the include file and processes it as if these contents had appeared  in
       the current UIL source file.

       You  can  nest  include  files;  that  is,  an include file can contain
       include directives.  The UIL compiler can process up to 100  references
       (including  the  file  containing  the  UIL module). Therefore, you can
       include up to 99 files in a single UIL module, including nested  files.
       Each time a file is opened counts as a reference, so including the same
       file twice counts as two references.

       The file_name is a simple string containing a file  specification  that
       identifies the file to be included. The rules for finding the specified
       file are similar to the rules for finding header, or .h files using the
       include  directive,  #include,  with a quoted string in C. The UIL uses
       the -I option for specifying a search directory for include files.

          +o  If you do not supply a directory, the UIL compiler  searches  for
             the include file in the directory of the main source file.

          o  If  the  compiler  does  not  find  the  include  file there, the
             compiler looks in the same directory as the source file.

          o  If you supply a directory, the UIL compiler  searches  only  that
             directory for the file.

   Names and Strings
       Names  can  consist  of any of the characters A to Z, a to z, 0 to 9, $
       (dollar sign), and _ (underscore). Names cannot begin with a  digit  (0
       to 9). The maximum length of a name is 31 characters.

       UIL  gives  you  a  choice of either case-sensitive or case-insensitive
       names through a clause in the MODULE header.  For example, if names are
       case  sensitive, the names "sample" and "Sample" are distinct from each
       other. If names are case insensitive, these names are  treated  as  the
       same  name  and  can  be  used interchangeably. By default, UIL assumes
       names are case sensitive.

       In CASE-INSENSITIVE mode, the compiler outputs all  names  in  the  UID
       file  in  uppercase  form.  In CASE-SENSITIVE mode, names appear in the
       UIL file exactly as they appear in the source.

       The  following  table  lists  the  reserved  keywords,  which  are  not
       available for defining programmer defined names.

       +-----------------------------------------------+
       |              Reserved Keywords                |
       +-----------------------------------------------+
       |ARGUMENTS    CALLBACKS   CONTROLS   END        |
       |EXPORTED     FALSE       GADGET     IDENTIFIER |
       |INCLUDE      LIST        MODULE     OFF        |
       |ON           OBJECT      PRIVATE    PROCEDURE  |
       |PROCEDURES   TRUE        VALUE      WIDGET     |
       +-----------------------------------------------+
       The  UIL  unreserved  keywords  are described in the following list and
       table.  These  keywords  can  be  used  as  programmer  defined  names,
       however,  if  you  use  any  keyword as a name, you cannot use the UIL-
       supplied usage of that keyword.

          o  Built-in argument names (for example, XmNx, XmNheight)

          o  Built-in  reason   names   (for   example,   XmNactivateCallback,
             XmNhelpCallback)

          o  Character set names (for example, ISO_LATIN1, ISO_HEBREW_LR)

          o  Constant     value    names    (for    example,    XmMENU_OPTION,
             XmBROWSE_SELECT)

          o  Object types (for example, XmPushButton, XmBulletinBoard)

             +-----------------------------------------------------------------------+
             |                         Unreserved Keywords                           |
             +-----------------------------------------------------------------------+
             |ANY                         ARGUMENT                ASCIZ_STRING_TABLE |
             |ASCIZ_TABLE                 BACKGROUND              BOOLEAN            |
             |CASE_INSENSITIVE            CASE_SENSITIVE          CHARACTER_SET      |
             |COLOR                       COLOR_TABLE             COMPOUND_STRING    |
             |COMPOUND_STRING_COMPONENT   COMPOUND_STRING_TABLE   FILE               |
             |FLOAT                       FONT                    FONT_TABLE         |
             |FONTSET                     FOREGROUND              ICON               |
             |IMPORTED                    INTEGER                 INTEGER_TABLE      |
             |KEYSYM                      MANAGED                 NAMES              |
             |OBJECTS                     REASON                  RGB                |
             |RIGHT_TO_LEFT               SINGLE_FLOAT            STRING             |
             |STRING_TABLE                TRANSLATION_TABLE       UNMANAGED          |
             |USER_DEFINED                VERSION                 WIDE_CHARACTER     |
             |WIDGET                      XBITMAPFILE                                |
             +-----------------------------------------------------------------------+
       String literals can be composed of the uppercase and lowercase letters,
       digits,  and  punctuation  characters.   Spaces, tabs, and comments are
       special elements in the language. They are a means of delimiting  other
       elements,  such  as two names. One or more of these elements can appear
       before or after any other element in the  language.   However,  spaces,
       tabs,  and  comments  that  appear  in  string  literals are treated as
       character sequences rather than delimiters.

   Data Types
       UIL provides literals for several of the value types it supports.  Some
       of  the value types are not supported as literals (for example, pixmaps
       and string tables). You can specify values for  these  types  by  using
       functions  described  in  the Functions section.  UIL directly supports
       the following literal types:

          o  String literal

          o  Integer literal

          o  Boolean literal

          o  Floating-point literal

       UIL also includes the data type ANY, which is used to turn off  compile
       time checking of data types.

   String Literals
       A  string  literal  is  a  sequence  of  zero  or  more 8-bit or 16-bit
       characters or a combination delimited by ' (single quotation marks)  or
       " (double quotation marks).  String literals can also contain multibyte
       characters delimited with double quotation marks.  String literals  can
       be no more than 2000 characters long.

       A  single-quoted  string  literal  can  span  multiple source lines. To
       continue a single-quoted string literal, terminate the  continued  line
       with a \ (backslash). The literal continues with the first character on
       the next line.

       Double-quoted  string  literals  cannot  span  multiple  source  lines.
       (Because  double-quoted  strings can contain escape sequences and other
       special characters, you cannot use the backslash character to designate
       continuation  of  the  string.)  To build a string value that must span
       multiple source lines, use the concatenation operator  described  later
       in this section.

       The syntax of a string literal is one of the following:

       '[character_string]'
       [#char_set]"[character_string]"

       Both  string  forms associate a character set with a string value.  UIL
       uses the following rules to determine the  character  set  and  storage
       format for string literals:

          o  A    string    declared    as    'string'    is   equivalent   to
             #cur_charset"string",  where  cur_charset  will  be  the  codeset
             portion  of  the  value of the LANG environment variable if it is
             set or the value of XmFALLBACK_CHARSET if LANG is not set or  has
             no   codeset   component.    By  default,  XmFALLBACK_CHARSET  is
             ISO8859-1 (equivalent to ISO_LATIN1), but vendors  may  define  a
             different default.

          o  A  string declared as "string" is equivalent to #char_set"string"
             if you specified char_set as the default character  set  for  the
             module.   If  no default character set has been specified for the
             module, then if the -s option is provided to the uil  command  or
             the  use_setlocale_flag  is set for the callable compiler, Uil(),
             the string will be interpreted to be  a  string  in  the  current
             locale. This means that the string is parsed in the locale of the
             user by calling setlocale, its charset is XmFONTLIST_DEFAULT_TAG,
             and  that  if the string is converted to a compound string, it is
             stored as a locale encoded text segment.  Otherwise, "string"  is
             equivalent   to   #cur_charset"string",   where   cur_charset  is
             interpreted as described for single quoted strings.

          o  A string of the form "string" or #char_set"string" is stored as a
             null-terminated string.

       If the char_set in a string specified in the form above is not a built-
       in charset, and is not a  user-defined  charset,  the  charset  of  the
       string  will  be  set  to  XmFONTLIST_DEFAULT_TAG, and an informational
       message will be issued to the user to note that this  substitution  has
       been made.

       The  following  table  lists  the  character  sets supported by the UIL
       compiler for string literals.  Note that several UIL names map  to  the
       same  character  set. In some cases, the UIL name influences how string
       literals are read. For example, strings identified by a  UIL  character
       set  name  ending  in  _LR are read left-to-right.  Names that end in a
       different number reflect different fonts (for  example,  ISO_LATIN1  or
       ISO_LATIN6).   All  character  sets  in this table are represented by 8
       bits.

       +--------------------------------------------------+
       |            Supported Character Sets              |
       +--------------------------------------------------+
       |UIL Name        Description                       |
       +--------------------------------------------------+
       |ISO_LATIN1      GL: ASCII, GR: Latin-1 Supplement |
       |ISO_LATIN2      GL: ASCII, GR: Latin-2 Supplement |
       |ISO_ARABIC      GL:   ASCII,   GR:   Latin-Arabic |
       |                Supplement                        |
       |ISO_LATIN6      GL:   ASCII,   GR:   Latin-Arabic |
       |                Supplement                        |
       |ISO_GREEK       GL:   ASCII,   GR:    Latin-Greek |
       |                Supplement                        |
       |ISO_LATIN7      GL:    ASCII,   GR:   Latin-Greek |
       |                Supplement                        |
       |ISO_HEBREW      GL:   ASCII,   GR:   Latin-Hebrew |
       |                Supplement                        |
       |ISO_LATIN8      GL:   ASCII,   GR:   Latin-Hebrew |
       |                Supplement                        |
       |ISO_HEBREW_LR   GL:   ASCII,   GR:   Latin-Hebrew |
       |                Supplement                        |
       |ISO_LATIN8_LR   GL:   ASCII,   GR:   Latin-Hebrew |
       |                Supplement                        |
       |JIS_KATAKANA    GL: JIS Roman, GR: JIS Katakana   |
       +--------------------------------------------------+
       Following are the parsing rules for each of the character sets:

       All character sets
                 Character codes in the range 00...1F,  7F,  and  80...9F  are
                 control characters including both bytes of 16-bit characters.
                 The compiler flags these as illegal characters.

       ISO_LATIN1 ISO_LATIN2 ISO_LATIN3 ISO_GREEK ISO_LATIN4
                 These sets  are  parsed  from  left  to  right.   The  escape
                 sequences  for  null-terminated strings are also supported by
                 these character sets.

       ISO_HEBREW ISO_ARABIC ISO_LATIN8
                 These sets are parsed from right to left.  For  example,  the
                 string  #ISO_HEBREW"012345"  will generate a primitive string
                 of  "543210"  with  character  set  ISO_HEBREW.  The   string
                 direction  for  such a string would be right-to-left, so when
                 rendered, the string will  appear  as  "012345."  The  escape
                 sequences  for  null-terminated strings are also supported by
                 these character sets, and the  characters  that  compose  the
                 escape sequences are in left-to-right order. For example, you
                 would enter \n, not n\.

       ISO_HEBREW_LR ISO_ARABIC_LR ISO_LATIN8_LR
                 These sets are parsed from left to right.  For  example,  the
                 string  #ISO_HEBREW_LR"012345"  generates  a primitive string
                 "012345" with character set ISO_HEBREW. The string  direction
                 for  such  a string would still be right-to-left, however, so
                 when rendered, it will appear as "543210."  In  other  words,
                 the  characters  were  originally  typed in the same order in
                 which they would have  been  typed  in  Hebrew  (although  in
                 Hebrew,  the  typist would have been using a text editor that
                 went from right to left).  The  escape  sequences  for  null-
                 terminated  strings  are  also  supported  by these character
                 sets.

       JIS_KATAKANA
                 This set is parsed from left to right. The  escape  sequences
                 for  null-terminated  strings  are  also  supported  by  this
                 character set. Note that the \ (backslash) may  be  displayed
                 as a yen symbol.

       In  addition  to  designating  parsing rules for strings, character set
       information remains an attribute of a compound string.  If  the  string
       is  included  in  a string consisting of several concatenated segments,
       the character set information is included  with  that  string  segment.
       This  gives  the Motif Toolkit the information it needs to decipher the
       compound string and choose a font to display the string.

       For an application interface displayed only in English,  UIL  lets  you
       ignore  the distinctions between the two uses of strings.  The compiler
       recognizes by context when a string must be passed as a null-terminated
       string or as a compound string.

       The  UIL compiler recognizes enough about the various character sets to
       correctly parse string literals.  The compiler also  issues  errors  if
       you  use  a  compound  string  in  a  context  that supports only null-
       terminated strings.

       Since the character set names  are  keywords,  you  must  put  them  in
       lowercase  if  case-sensitive  names  are  in force.  If names are case
       insensitive, character set names can be uppercase, lowercase, or  mixed
       case.

       In  addition  to the built-in character sets recognized by UIL, you can
       define your own character sets with the CHARACTER_SET function. You can
       use  the  CHARACTER_SET  function  anywhere  a  character  set  can  be
       specified.

       String literals can contain characters with the eighth (high-order) bit
       set. You cannot type control characters (00-1F, 7F, and 80-9F) directly
       in a single-quoted string literal. However,  you  can  represent  these
       characters  with  escape sequences. The following list shows the escape
       sequences for special characters.

       \b        Backspace

       \f        Form-feed

       \n        Newline

       \r        Carriage return

       \t        Horizontal tab

       \v        Vertical tab

       \'        Single quotation mark

       \"        Double quotation mark

       \\        Backslash

       \integer\ Character whose internal representation is given  by  integer
                 (in the range 0 to 255 decimal)

       Note  that escape sequences are processed literally in strings that are
       parsed in the current locale (localized strings).

       The UIL compiler  does  not  process  newline  characters  in  compound
       strings.   The  effect  of  a  newline  character  in a compound string
       depends only on the character set of the string, and the result is  not
       guaranteed to be a multiline string.

       Compound String Literals

       A  compound  string consists of a string of 8-bit, 16-bit, or multibyte
       characters, a named character set, and a  writing  direction.  Its  UIL
       data type is compound_string.

       The  writing direction of a compound string is implied by the character
       set specified for the  string.  You  can  explicitly  set  the  writing
       direction for a compound string by using the COMPOUND_STRING function.

       A  compound  string  can consist of a sequence of concatenated compound
       strings, null-terminated strings, or a combination  of  both,  each  of
       which   can  have  a  different  character  set  property  and  writing
       direction. Use the concatenation operator &  (ampersand)  to  create  a
       sequence of compound strings.

       Each  string in the sequence is stored, including the character set and
       writing direction information.

       Generally, a string literal is stored in the UID  file  as  a  compound
       string  when  the  literal  consists  of  concatenated  strings  having
       different character sets or writing directions, or  when  you  use  the
       string  to  specify  a  value  for an argument that requires a compound
       string value. If you want to guarantee that a string literal is  stored
       as a compound string, you must use the COMPOUND_STRING function.

       Data Storage Consumption for String Literals

       The  way  a string literal is stored in the UID file depends on how you
       declare and use the string. The UIL compiler automatically  converts  a
       null-terminated  string  to  a compound string if you use the string to
       specify the value of an  argument  that  requires  a  compound  string.
       However, this conversion is costly in terms of storage consumption.

       PRIVATE,  EXPORTED,  and IMPORTED string literals require storage for a
       single allocation when the literal is declared; thereafter, storage  is
       required  for  each reference to the literal. Literals declared in-line
       require storage for both an allocation and a reference.

       The following table summarizes  data  storage  consumption  for  string
       literals. The storage requirement for an allocation consists of a fixed
       portion and a variable portion. The fixed portion of an  allocation  is
       roughly  the  same  as  the  storage requirement for a reference (a few
       bytes).  The storage consumed by the variable portion  depends  on  the
       size  of  the  literal  value  (that  is, the length of the string). To
       conserve storage space, avoid making string literal  declarations  that
       result in an allocation per use.

       +---------------------------------------------+
       |Data Storage Consumption for String Literals |
       +----------+-----------+-----------+----------+
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       +----------+-----------+-----------+----------+
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       |          |           |           |          |
       +----------+-----------+-----------+----------+
   Integer Literals
       An  integer  literal  represents  the value of a whole number.  Integer
       literals have the form of an optional sign  followed  by  one  or  more
       decimal digits.  An integer literal must not contain embedded spaces or
       commas.

       Integer literals are  stored  in  the  UID  file  as  32-bit  integers.
       Exported and imported integer literals require a single allocation when
       the literal is  declared;  thereafter,  a  few  bytes  of  storage  are
       required  for  each  reference to the literal. Private integer literals
       and those declared in-line require allocation and reference storage per
       use.   To   conserve   storage  space,  avoid  making  integer  literal
       declarations that result in an allocation per use.

       The  following  table  shows  data  storage  consumption  for   integer
       literals.

       +----------------------------------------------+
       |Data Storage Consumption for Integer Literals |
       +--------------+-------------------------------+
       |Declaration   |Storage Requirements Per Use   |
       +--------------+-------------------------------+
       |In-line       |An    allocation    and    a   |
       |              |reference    (within     the   |
       |              |module)                        |
       |Private       |An    allocation    and    a   |
       |              |reference    (within     the   |
       |              |module)                        |
       |Exported      |A  reference (within the UID   |
       |              |hierarchy)                     |
       |Imported      |A reference (within the  UID   |
       |              |hierarchy)                     |
       +--------------+-------------------------------+
   Boolean Literal
       A  Boolean  literal represents the value True (reserved keyword TRUE or
       On) or False (reserved keyword  FALSE  or  Off).   These  keywords  are
       subject to case-sensitivity rules.

       In  a UID file, TRUE is represented by the integer value 1 and FALSE is
       represented by the integer value 0 (zero).

       Data storage consumption for Boolean literals is the same as  that  for
       integer literals.

   Floating-Point Literal
       A  floating-point  literal  represents  the  value of a real (or float)
       number.  Floating-point literals have the following form:

       [+|-][integer].integer[E|e[+|-]exponent]

       For maximum portability, a floating-point literal can represent  values
       in the range 1.0E-37 to 1.0E+37 with at least 6 significant digits.  On
       many machines this range will be wider, with more  significant  digits.
       A floating-point literal must not contain embedded spaces or commas.

       Floating-point literals are stored in the UID file as double-precision,
       floating-point numbers.  The following table gives  examples  of  valid
       and invalid floating-point notation for the UIL compiler.

       +----------------------------------------------------------------+
       |                    Floating Point Literals                     |
       +----------------------------------------------------------------+
       |Valid Floating-Point Literals   Invalid Floating-Point Literals |
       +----------------------------------------------------------------+
       |1.0                             1e1 (no decimal point)          |
       |3.1415E-2 (equals .031415)      2.87 e6 (embedded blanks)       |
       |-6.29e7 (equals -62900000)      2.0e100 (out of range)          |
       +----------------------------------------------------------------+
       Data  storage  consumption  for  floating-point literals is the same as
       that for integer literals.

       The purpose of the ANY data type is to shut off the data-type  checking
       feature  of  the  UIL  compiler.  You can use the ANY data type for the
       following:

          o  Specifying the type of a callback procedure tag

          o  Specifying the type of a user-defined argument

       You can use the ANY data type when you need to use a type not supported
       by the UIL compiler or when you want the data-type restrictions imposed
       by the compiler to be relaxed.  For example, you might want to define a
       widget  having  an  argument that can accept different types of values,
       depending on run-time circumstances.

       If you specify that an argument takes an ANY value, the  compiler  does
       not check the type of the value specified for that argument; therefore,
       you need to take care when specifying a value for an argument  of  type
       ANY.   You could get unexpected results at run time if you pass a value
       having a data type that the widget does not support for that argument.

   Expressions
       UIL includes compile-time  value  expressions.  These  expressions  can
       contain   references  to  other  UIL  values,  but  cannot  be  forward
       referenced.

       The following table lists the set of operators in UIL that allow you to
       create  integer, real, and Boolean values based on other values defined
       with the UIL module. In the table, a precedence of 1 is the highest.

       +-----------------------------------------------------------+
       |Valid Operators                                            |
       +---------+-----------------+------------------+------------+
       |Operator | Operand Types   | Meaning          | Precedence |
       +---------+-----------------+------------------+------------+
       |   ~     | Boolean         | NOT              |     1      |
       |         | integer         | One's complement |            |
       |   -     | float           | Negate           |     1      |
       |         | integer         | Negate           |            |
       |   +     | float           | NOP              |     1      |
       |         | integer         | NOP              |            |
       |   *     | float,float     | Multiply         |     2      |
       |         | integer,integer | Multiply         |            |
       |   /     | float,float     | Divide           |     2      |
       |         | integer,integer | Divide           |            |
       |   +     | float,float     | Add              |     3      |
       |         | integer,integer | Add              |            |
       |   -     | float,float     | Subtract         |     3      |
       |         | integer,integer | Subtract         |            |
       |   >>    | integer,integer | Shift right      |     4      |
       |   <<    | integer,integer | Shift left       |     4      |
       |   &     | Boolean,Boolean | AND              |     5      |
       |         | integer,integer | Bitwise AND      |            |
       |         | string,string   | Concatenate      |            |
       |   |     | Boolean,Boolean | OR               |     6      |
       |         | integer,integer | Bitwise OR       |            |
       |   ^     | Boolean,Boolean | XOR              |     6      |
       |         | integer,integer | Bitwise XOR      |            |
       +---------+-----------------+------------------+------------+
       A string can be either a  single  compound  string  or  a  sequence  of
       compound  strings.  If  the  two  concatenated  strings  have different
       properties (such as writing direction or character set), the result  of
       the concatenation is a multisegment compound string.

       The string resulting from the concatenation is a null-terminated string
       unless one or more of the following conditions exists:

          o  One of the operands is a compound string

          o  The operands have different character set properties

          o  The operands have different writing directions

       Then the resulting  string  is  a  compound  string.   You  cannot  use
       imported or exported values as operands of the concatenation operator.

       The  result  of  each  operator has the same type as its operands.  You
       cannot mix types in an expression without using conversion routines.

       You can use parentheses to override the normal precedence of operators.
       In  a  sequence  of  unary  operators,  the operations are performed in
       right-to-left order. For example, - + -A is equivalent to -(+(-A)).  In
       a  sequence  of binary operators of the same precedence, the operations
       are  performed  in  left-to-right  order.  For  example,   A*B/C*D   is
       equivalent to ((A*B)/C)*D.

       A value declaration gives a value a name. You cannot redefine the value
       of that name in a subsequent value declaration.  You can  use  a  value
       containing  operators  and  functions anywhere you can use a value in a
       UIL module.  You cannot use imported values as operands in expressions.

       Several of the binary operators are defined for  multiple  data  types.
       For  example,  the  operator for multiplication (*) is defined for both
       floating-point and integer operands.

       For the UIL compiler to perform these binary operations, both  operands
       must  be  of  the  same type.  If you supply operands of different data
       types, the UIL compiler automatically converts one of the  operands  to
       the type of the other according to the following conversions rules:

          o  If  the  operands  are  an  integer and a Boolean, the Boolean is
             converted to an integer.

          o  If the operands are an integer and a floating-point, the  integer
             is converted to an floating-point.

          o  If  the  operands are a floating-point and a Boolean, the Boolean
             is converted to a floating-point.

       You can also explicitly convert the data type of a value by  using  one
       of the conversion functions INTEGER, FLOAT or SINGLE_FLOAT.

   Functions
       UIL provides functions to generate the following types of values:

          o  Character sets

          o  Keysyms

          o  Colors

          o  Pixmaps

          o  Single-precision, floating-point numbers

          o  Double-precision, floating-point numbers

          o  Fonts

          o  Fontsets

          o  Font tables

          o  Compound strings

          o  Compound string tables

          o  ASCIZ (null-terminated) string tables

          o  Wide character strings

          o  Widget class names

          o  Integer tables

          o  Arguments

          o  Reasons

          o  Translation tables

       Remember  that  all  examples  in  the  following sections assume case-
       insensitive  mode.  Keywords  are  shown  in   uppercase   letters   to
       distinguish   them  from  user-specified  names,  which  are  shown  in
       lowercase letters.  This use of uppercase letters is  not  required  in
       case-insensitive  mode.  In  case-sensitive  mode,  keywords must be in
       lowercase letters.

       CHARACTER_SET(string_expression[, property[, ...]])

                 You can define your own character sets with the CHARACTER_SET
                 function.  You  can use the CHARACTER_SET function anywhere a
                 character set can be specified.

                 The result of the CHARACTER_SET function is a  character  set
                 with  the  name  string_expression  and  the  properties  you
                 specify.  string_expression must be a null-terminated string.
                 You  can  optionally  include  one  or  both of the following
                 clauses to specify properties  for  the  resulting  character
                 set:

       RIGHT_TO_LEFT = boolean_expression
       SIXTEEN_BIT = boolean_expression

                 The  RIGHT_TO_LEFT  clause sets the default writing direction
                 of the string from right to  left  if  boolean_expression  is
                 True, and right to left otherwise.

                 The  SIXTEEN_BIT  clause  allows  the strings associated with
                 this character set to be interpreted as 16-bit characters  if
                 boolean_expression is True, and 8-bit characters otherwise.

       KEYSYM(string_literal)

                 The  KEYSYM  function  is  used  to  specify  a  keysym for a
                 mnemonic  resource.   string_literal  must  contain  a  valid
                 KeySym   name.    (See   XStringToKeysym(3   X11)   for  more
                 information.)

       COLOR(string_expression[,FOREGROUND|BACKGROUND])

                 The COLOR function supports the definition of colors.   Using
                 the  COLOR  function,  you can designate a value to specify a
                 color and then use that value for arguments requiring a color
                 value.   The  string  expression  names the color you want to
                 define;  the  optional  keywords  FOREGROUND  and  BACKGROUND
                 identify  how  the  color  is to be displayed on a monochrome
                 device when the color is used in the definition  of  a  color
                 table.

                 The  UIL  compiler does not have built-in color names. Colors
                 are a server-dependent attribute of  an  object.  Colors  are
                 defined  on each server and may have different red-green-blue
                 (RGB) values on each server. The string you  specify  as  the
                 color argument must be recognized by the server on which your
                 application runs.

                 In a UID file, UIL represents a color as a character  string.
                 MRM  calls X translation routines that convert a color string
                 to the device-specific pixel value. If you are running  on  a
                 monochrome  server,  all  colors translate to black or white.
                 If you are on a color server, the color  names  translate  to
                 their proper colors if the following conditions are met:

                    o  The color is defined.

                    o  The color map is not yet full.

                 If  the  color  map  is  full, even valid colors translate to
                 black or white (foreground or background).

                 Interfaces do not, in general, specify colors for widgets, so
                 that  the  selection  of colors can be controlled by the user
                 through the .Xdefaults file.

                 To write an application that  runs  on  both  monochrome  and
                 color  devices,  you  need to specify which colors in a color
                 table (defined with the  COLOR_TABLE  function)  map  to  the
                 background  and which colors map to the foreground.  UIL lets
                 you use the COLOR function to designate this mapping  in  the
                 definition  of the color.  The following example shows how to
                 use the COLOR function to map the color red to the background
                 color on a monochrome device:

       VALUE c: COLOR ( 'red',BACKGROUND );

                 The  mapping  comes  into  play  only when the MRM is given a
                 color and the application is to be displayed on a  monochrome
                 device.  In  this case, each color is considered to be in one
                 of the following three categories:

                    o  The color is mapped to  the  background  color  on  the
                       monochrome device.

                    o  The  color  is  mapped  to  the foreground color on the
                       monochrome device.

                    o  Monochrome mapping is undefined for this color.

                 If the color is mapped to the foreground or background color,
                 MRM   substitutes   the   foreground   or  background  color,
                 respectively. If you do not specify  the  monochrome  mapping
                 for a color, MRM passes the color string to the Motif Toolkit
                 for mapping to the foreground or background color.

       RGB(red_integer, green_integer, blue_integer)

                 The three integers define the values for the red, green,  and
                 blue  components  of  the color, in that order. The values of
                 these components can range from 0 to 65,535, inclusive.   The
                 values may be represented as integer expressions.

                 In a UID file, UIL represents an RGB value as three integers.
                 MRM calls X translation routines that convert the integers to
                 the  device-specific  pixel  value.   If you are running on a
                 monochrome server, all colors translate to  black  or  white.
                 If  you  are on a color server, RGB values translate to their
                 proper colors if the  colormap  is  not  yet  full.   If  the
                 colormap   is  full,  values  translate  to  black  or  white
                 (foreground or background).

       COLOR_TABLE(color_expression='character'[,...])

                 The color expression is a previously defined color,  a  color
                 defined  in  line  with  the  COLOR  function,  or the phrase
                 BACKGROUND COLOR or FOREGROUND COLOR. The  character  can  be
                 any valid UIL character.

                 The COLOR_TABLE function provides a device-independent way to
                 specify a set of colors.  The  COLOR_TABLE  function  accepts
                 either  previously  defined  UIL color names or in line color
                 definitions (using the COLOR function).  A color  table  must
                 be  private  because  its  contents  must be known by the UIL
                 compiler to construct an icon.  The  colors  within  a  color
                 table, however, can be imported, exported, or private.

                 The single letter associated with each color is the character
                 you use to represent that color when creating an icon.   Each
                 letter  used  to  represent a color must be unique within the
                 color table.

       ICON([COLOR_TABLE=color_table_name,] row[,...)
                 color-table-name must refer to  a  previously  defined  color
                 table,  and  row  is a character expression giving one row of
                 the icon.

                 The ICON function describes a  rectangular  icon  that  is  x
                 pixels  wide  and  y  pixels high.  The strings surrounded by
                 single  quotation  marks  describe  the  icon.   Each  string
                 represents  a  row  in the icon; each character in the string
                 represents a pixel.

                 The first row in an icon definition determines the  width  of
                 the  icon.   All rows must have the same number of characters
                 as the first row.  The height of the icon is dictated by  the
                 number of rows.  The maximum number of rows is 999.

                 The  first  argument  of  the  ICON function (the color table
                 specification) is optional and identifies the colors that are
                 available   in   this  icon.   By  using  the  single  letter
                 associated with each color, you can specify the color of each
                 pixel   in  the  icon.   The  icon  must  be  constructed  of
                 characters defined in the specified color table.

                 A default color table  is  used  if  you  omit  the  argument
                 specifying  the color table. To make use of the default color
                 table, the rows of your icon must  contain  only  spaces  and
                 asterisks.  The default color table is defined as follows:

       COLOR_TABLE( BACKGROUND COLOR = ' ', FOREGROUND COLOR = '*')

                 You  can  define other characters to represent the background
                 color  and  foreground  color  by  replacing  the  space  and
                 asterisk in the BACKGROUND COLOR and FOREGROUND COLOR clauses
                 shown in the previous statement.  You can  specify  icons  as
                 private,   imported,  or  exported.   Use  the  MRM  function
                 MrmFetchIconLiteral to retrieve an exported icon at run time.

       XBITMAPFILE(string_expression)
                 The XBITMAPFILE function is similar to the ICON  function  in
                 that  both  describe a rectangular icon that is x pixels wide
                 and y  pixels  high.   However,  XBITMAPFILE  allows  you  to
                 specify  an  external  file containing the definition of an X
                 bitmap, whereas all ICON function definitions must  be  coded
                 directly  within UIL. X bitmap files can be generated by many
                 different X applications.  UIL reads these files through  the
                 XBITMAPFILE  function, but does not support creation of these
                 files.  The X bitmap file specified as the  argument  to  the
                 XBITMAPFILE function is read at application run time by MRM.

                 The  XBITMAPFILE  function returns a value of type pixmap and
                 can be used anywhere a pixmap data type is expected.

       SINGLE_FLOAT(real_number_literal)

                 The  SINGLE_FLOAT  function  lets  you  store  floating-point
                 literals  in  UIL  files  as single-precision, floating-point
                 numbers.  Single-precision floating-point numbers  can  often
                 be  stored using less memory than double-precision, floating-
                 point numbers.  The  real_number_literal  can  be  either  an
                 integer literal or a floating-point literal.

       FLOAT(real_number_literal)

                 The  FLOAT function lets you store floating-point literals in
                 UIL files as double-precision, floating-point  numbers.   The
                 real_number_literal  can  be  either  an integer literal or a
                 floating-point literal.

       FONT(string_expression[, CHARACTER_SET=char_set])

                 You define fonts with the  FONT  function.   Using  the  FONT
                 function,  you  designate  a value to specify a font and then
                 use that value for arguments that require a font value.   The
                 UIL compiler has no built-in fonts.

                 Each font makes sense only in the context of a character set.
                 The FONT function has an  additional  parameter  to  let  you
                 specify  the  character  set for the font.  This parameter is
                 optional; if you omit it, the default character  set  depends
                 on  the  value of the LANG environment variable if it is set,
                 or on the value of XmFALLBACK_CHARSET if LANG is not set.

                 string_expression specifies the name  of  the  font  and  the
                 clause  CHARACTER_SET  = char_set specifies the character set
                 for the  font.   The  string  expression  used  in  the  FONT
                 function cannot be a compound string.

       FONTSET(string_expression[,...][, CHARACTER_SET=charset])

                 You  define  fontsets  with  the FONTSET function.  Using the
                 FONTSET function, you designate a set of  values  to  specify
                 fonts  and then use those values for arguments that require a
                 fontset.  The UIL compiler has no built-in fonts.

                 Each font makes sense only in the context of a character set.
                 The  FONTSET  function has an additional parameter to let you
                 specify the character set for the font.   This  parameter  is
                 optional;  if  you omit it, the default character set depends
                 on the value of the LANG environment variable if it  is  set,
                 or on the value of XmFALLBACK_CHARSET if LANG is not set.

                 The  string expression specifies the name of the font and the
                 clause CHARACTER_SET = char_set specifies the  character  set
                 for  the  font.   The  string  expression used in the FONTSET
                 function cannot be a compound string.

       FONT_TABLE(font_expression[,...])

                 A font table is a sequence of pairs of  fonts  and  character
                 sets.  At run time, when an object needs to display a string,
                 the object scans the font table for the  character  set  that
                 matches the character set of the string to be displayed.  UIL
                 provides the FONT_TABLE function to let you  supply  such  an
                 argument.   font_expression  is  created  with  the  FONT and
                 FONTSET functions.

                 If you specify a single font value  to  specify  an  argument
                 that  requires  a  font table, the UIL compiler automatically
                 converts a font value to a font table.

       COMPOUND_STRING(string_expression[,property[,...]])
                 Use the COMPOUND_STRING function to set properties of a null-
                 terminated  string  and to convert it into a compound string.
                 The properties you can set  are  the  writing  direction  and
                 separator.

                 The  result  of  the  COMPOUND_STRING  function is a compound
                 string with the string  expression  as  its  value.  You  can
                 optionally  include  one  or more of the following clauses to
                 specify properties for the resulting compound string:

                 RIGHT_TO_LEFT     =     boolean_expression     SEPARATE     =
                 boolean_expression

                 The  RIGHT_TO_LEFT  clause  sets the writing direction of the
                 string from right to left if boolean_expression is True,  and
                 left  to  right otherwise.  Specifying this argument does not
                 cause the value of the string expression to change.   If  you
                 omit the RIGHT_TO_LEFT argument, the resulting string has the
                 same writing direction as string_expression.

                 The SEPARATE clause appends a separator to  the  end  of  the
                 compound  string  if  boolean_expression is True. If you omit
                 the SEPARATE clause, the resulting string  does  not  have  a
                 separator.

                 You cannot use imported or exported values as the operands of
                 the COMPOUND_STRING function.

       COMPOUND_STRING_COMPONENT(component_type [, {string | enumval}])
                 Use the COMPOUND_STRING_COMPONENT function to create compound
                 strings   in  UIL  consisting  of  single  components.   This
                 function  is  analagous  to  XmStringComponentCreate.    This
                 function  lets  you create simple compound strings containing
                 components     such     as     XmSTRING_COMPONENT_TAB     and
                 XmSTRING_COMPONENT_RENDITION_BEGIN  which are not produced by
                 the COMPOUND_STRING function. These components  can  then  be
                 concatenated  to other compound strings to build more complex
                 compound strings.

                 The  first  argument   must   be   an   XmStringComponentType
                 enumerated  constant.   The  type  and  interpretation of the
                 second argument depends on the first argument.  For  example,
                 if  you specify any of the following enumerated constants for
                 the first argument, then you  should  not  specify  a  second
                 argument:                       XmSTRING_COMPONENT_SEPARATOR,
                 XmSTRING_COMPONENT_LAYOUT_POP,  XmSTRING_COMPONENT_TAB,   and
                 XmSTRING_COMPONENT_LOCALE.    However,   if  you  specify  an
                 enumerated constant from the following group, then  you  must
                 supply     a     string     as     the    second    argument:
                 XmSTRING_COMPONENT_CHARSET,          XmSTRING_COMPONENT_TEXT,
                 XmSTRING_COMPONENT_LOCALE_TEXT,
                 XmSTRING_COMPONENT_WIDECHAR_TEXT,
                 XmSTRING_COMPONENT_RENDITION_BEGIN,                       and
                 XmSTRING_COMPONENT_RENDITION_END.      If     you     specify
                 XmSTRING_COMPONENT_DIRECTION  as the first argument, then you
                 must specify an XmStringDirection enumerated constant as  the
                 second     argument.      Finally,     if     you     specify
                 XmSTRING_COMPONENT_LAYOUT_PUSH as the  first  argument,  then
                 you  must  specify  an XmDirection enumerated constant as the
                 second argument.

                 The           compound           string            components
                 XmSTRING_COMPONENT_RENDITION_BEGIN,                       and
                 XmSTRING_COMPONENT_RENDITION_END take,  for  their  argument,
                 the  "tag,"  or  name, of a rendition from the current render
                 table. See the following section for more  information  about
                 how to specify a render table.

       COMPOUND_STRING_TABLE(string_expression[,...])
                 A  compound  string  table  is  an array of compound strings.
                 Objects requiring a  list  of  string  values,  such  as  the
                 XmNitems  and XmNselectedItems arguments for the list widget,
                 use string table values. The  COMPOUND_STRING_TABLE  function
                 builds the values for these two arguments of the list widget.
                 The COMPOUND_STRING_TABLE function generates a value of  type
                 string_table.    The  name  STRING_TABLE  is  a  synonym  for
                 COMPOUND_STRING_TABLE.

                 The strings inside the string table must be  simple  strings,
                 which  the  UIL  compiler  automatically converts to compound
                 strings.

       ASCIZ_STRING_TABLE(string_expression[,...])
                 An ASCIZ string table is an array of ASCIZ  (null-terminated)
                 string  values  separated by commas. This function allows you
                 to pass more than one ASCIZ string as a callback  tag  value.
                 The  ASCIZ_STRING_TABLE  function  generates  a value of type
                 asciz_table.   The  name  ASCIZ_TABLE  is   a   synonym   for
                 ASCIZ_STRING_TABLE.

       WIDE_CHARACTER(string_expression)

                 Use  the WIDE_CHARACTER function to generate a wide character
                 string from null-terminated string in the current locale.

       CLASS_REC_NAME(string_expression)

                 Use the CLASS_REC_NAME function to generate  a  widget  class
                 name.   For a widget class defined by the toolkit, the string
                 argument is the  name  of  the  class.   For  a  user-defined
                 widget,  the  string  argument  is  the  name of the creation
                 routine for the widget.

       INTEGER_TABLE(integer_expression[,...])
                 An integer table is an array of integer values  separated  by
                 commas.   This  function  allows  you  to  pass more than one
                 integer per callback tag value.  The  INTEGER_TABLE  function
                 generates a value of type integer_table.

       ARGUMENT(string_expression[, argument_type])

                 The ARGUMENT function defines the arguments to a user-defined
                 widget.  Each of the objects that can  be  described  by  UIL
                 permits  a  set  of  arguments,  listed  in  Appendix  B. For
                 example, XmNheight is an argument to most objects and has  an
                 integer  data  type.  To  specify  height  for a user-defined
                 widget, you can use the built-in argument name XmNheight, and
                 specify  an  integer  value when you declare the user-defined
                 widget.  You do not use  the  ARGUMENT  function  to  specify
                 arguments that are built into the UIL compiler.

                 The  string_expression name is the name the UIL compiler uses
                 for the argument in the UID file.  argument_type is the  type
                 of  value  that  can  be associated with the argument. If you
                 omit the second argument, the default  type  is  ANY  and  no
                 value type checking occurs. Use one of the following keywords
                 to specify the argument type:

                    o  ANY

                    o  ASCIZ_TABLE

                    o  BOOLEAN

                    o  COLOR

                    o  COMPOUND_STRING

                    o  FLOAT

                    o  FONT

                    o  FONT_TABLE

                    o  FONTSET

                    o  ICON

                    o  INTEGER

                    o  INTEGER_TABLE

                    o  KEYSYM

                    o  PIXMAP

                    o  REASON

                    o  SINGLE_FLOAT

                    o  STRING

                    o  STRING_TABLE

                    o  TRANSLATION_TABLE

                    o  WIDE_CHARACTER

                    o  WIDGET

                 You can use the ARGUMENT function to allow the  UIL  compiler
                 to recognize extensions to the Motif Toolkit. For example, an
                 existing widget may accept a new argument. Using the ARGUMENT
                 function, you can make this new argument available to the UIL
                 compiler before  the  updated  version  of  the  compiler  is
                 released.

       REASON(string_expression)

                 The  REASON  function  is useful for defining new reasons for
                 user-defined widgets.

                 Each of the objects in the Motif Toolkit  defines  a  set  of
                 conditions  under  which  it  calls  a user-defined function.
                 These conditions are known as callback  reasons.   The  user-
                 defined  functions  are  termed callback procedures. In a UIL
                 module, you use a  callbacks  list  to  specify  which  user-
                 defined functions are to be called for which reasons.

                 Appendix  B lists the callback reasons supported by the Motif
                 Toolkit objects.

                 When you  declare  a  user-defined  widget,  you  can  define
                 callback  reasons  for that widget using the REASON function.
                 The string expression specifies the argument name  stored  in
                 the  UID file for the reason. This reason name is supplied to
                 the widget creation routine at run time.

       TRANSLATION_TABLE(string_expression[,...])

                 Each of the Motif Toolkit widgets  has  a  translation  table
                 that  maps  X  events  (for  example,  mouse  button  1 being
                 pressed) to a sequence of actions. Through widget  arguments,
                 such  as the common translations argument, you can specify an
                 alternate set of events or actions for a  particular  widget.
                 The  TRANSLATION_TABLE  function  creates a translation table
                 that can be used as the value of an argument that is  of  the
                 data type translation_table.

                 You can use one of the following translation table directives
                 with the TRANSLATION_TABLE function: #override, #augment,  or
                 #replace.   The  default  is #replace.  If you specify one of
                 these  directives,  it  must  be  the  first  entry  in   the
                 translation table.

                 The  #override directive causes any duplicate translations to
                 be ignored.  For example, if a translation for <Btn1Down>  is
                 already defined in the current translations for a PushButton,
                 the translation defined  by  new_translations  overrides  the
                 current  definition.  If the #augment directive is specified,
                 the  current  definition  takes  precedence.   The   #replace
                 directive   replaces  all  current  translations  with  those
                 specified in the XmNtranslations resource.

   Renditions and Render Tables
       In addition to the string direction, each  compound  string  carries  a
       great  deal  of  information about how its text is to be rendered. Each
       compound string contains a "tag," identifying  the  "rendition"  to  be
       used  to  draw  that string. The rendition contains such information as
       the font, the size, the color, whether the text is to be underlined  or
       crossed  out,  and  the  position  and  style  of  any  tab stops. Many
       renditions are combined into a "render table," which  is  specified  to
       any  widget  with  the  XmNrenderTable  resource,  and  in the widget's
       controls list.

       UIL implements render tables, renditions, tab lists, and tab stops as a
       special  class of objects, in a form similar to the widget class. These
       objects are not themselves widgets or gadgets, but the format  used  by
       UIL  to  specify  widget resources provides a convenient way to specify
       the qualities and dependencies of these objects.

       For example, a render table, included in some widget's  controls  list,
       must  also  have  a  controls list in its specification, containing the
       names of its member renditions. Each rendition, in  its  specification,
       will  contain  an arguments list specifying such qualities as the font,
       the color, and whether the  text  is  to  be  underlined.  Any  of  the
       renditions may also control a tablist, which will itself control one or
       more tab stops.

       Please refer to the Motif Programmer's Guide for a complete description
       of  renditions and render tables, and for an example of how to use them
       in UIL.

RELATED INFORMATION

       uil(1), Uil(3)

                                                             UIL(file formats)