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NAME

       xmerl - Functions for exporting XML data to an external format.

DESCRIPTION

       Functions for exporting XML data to an external format.

EXPORTS

       callbacks(Module) -> Result

              Types:

                 Module = atom()
                 Result = [atom()]

              Find the list of inherited callback modules for a given module.

       export(Content, Callback) -> ExportedFormat

              Equivalent to export(Data, Callback, []).

       export(Content, Callback, RootAttributes) -> ExportedFormat

              Types:

                 Content = [Element]
                 Callback = atom()
                 RootAttributes = [XmlAttributes]

              Exports normal, well-formed XML content, using the specified callback-module.

              Element is any of:

                * #xmlText{}

                * #xmlElement{}

                * #xmlPI{}

                * #xmlComment{}

                * #xmlDecl{}

              (See xmerl.hrl for the record definitions.) Text in #xmlText{} elements can be deep
              lists of characters and/or binaries.

              RootAttributes is a list of #xmlAttribute{}  attributes  for  the  #root#  element,
              which  implicitly becomes the parent of the given Content. The tag-handler function
              for #root# is thus  called  with  the  complete  exported  data  of  Content.  Root
              attributes can be used to specify e.g. encoding or other metadata of an XML or HTML
              document.

              The Callback module should contain hook functions for all tags present in the  data
              structure. A hook function must have the following format:

                  Tag(Data, Attributes, Parents, E)

              where  E  is the corresponding #xmlElement{}, Data is the already-exported contents
              of E and Attributes is the list of #xmlAttribute{} records of E.  Finally,  Parents
              is   the   list   of   parent   nodes   of  E,  on  the  form  [{ParentTag::atom(),
              ParentPosition::integer()}].

              The hook function should return either the data to be exported, or a tuple  {'#xml-
              alias#',  NewTag::atom()}, or a tuple {'#xml-redefine#', Content}, where Content is
              a content list (which can be on simple-form; see export_simple/2 for details).

              A callback module can inherit definitions from other callback modules, through  the
              required function '#xml-interitance#() -> [ModuleName::atom()].

              See also: export/2, export_simple/3.

       export_content(Es::Content, Callbacks) -> term()

              Types:

                 Content = [Element]
                 Callback = [atom()]

              Exports normal XML content directly, without further context.

       export_element(E, CB) -> term()

              Exports a normal XML element directly, without further context.

       export_element(E, CallbackModule, CallbackState) -> ExportedFormat

              For on-the-fly exporting during parsing (SAX style) of the XML document.

       export_simple(Content, Callback) -> ExportedFormat

              Equivalent to export_simple(Content, Callback, []).

       export_simple(Content, Callback, RootAttrs::RootAttributes) -> ExportedFormat

              Types:

                 Content = [Element]
                 Callback = atom()
                 RootAttributes = [XmlAttributes]

              Exports "simple-form" XML content, using the specified callback-module.

              Element is any of:

                * {Tag, Attributes, Content}

                * {Tag, Content}

                * Tag

                * IOString

                * #xmlText{}

                * #xmlElement{}

                * #xmlPI{}

                * #xmlComment{}

                * #xmlDecl{}

              where

                * Tag = atom()

                * Attributes = [{Name, Value}]

                * Name = atom()

                * Value = IOString | atom() | integer()

              Normal-form  XML  elements  can thus be included in the simple-form representation.
              Note that content lists must be flat. An IOString is  a  (possibly  deep)  list  of
              characters and/or binaries.

              RootAttributes is a list of:

                * XmlAttributes = #xmlAttribute{}

              See  export/3  for details on the callback module and the root attributes. The XML-
              data is always converted to normal form before being passed to the callback module.

              See also: export/3, export_simple/2.

       export_simple_content(Content, Callback) -> term()

              Exports simple XML content directly, without further context.

       export_simple_element(Content, Callback) -> term()

              Exports a simple XML element directly, without further context.

AUTHORS

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                                           xmerl 1.3.5                                xmerl(3erl)