Ubuntu Manpage: serdi — read and write RDF syntax

NAME

     serdi — read and write RDF syntax

SYNOPSIS

     serdi [-abefhlqv] [-c prefix] [-i syntax] [-o syntax] [-p prefix] [-r root] [-s string]
           input [base_uri]

DESCRIPTION

serdi is a fast command-line utility for streaming and processing RDF data. It reads an RDF
document and writes the data to stdout, possibly transformed and/or in a different syntax.
By default, the input syntax is guessed from the file extension, and output is written in
NTriples or NQuads.

serdi can be used to check for syntax errors, convert from one syntax to another, pretty-
print documents, or transform URIs and blank node IDs.

The options are as follows:

-a Write ASCII output. If this is enabled, all non-ASCII characters will be escaped, even
if the output syntax allows them to be written in UTF-8.

-b Bulk output writing. If this is enabled, output will be written a page at a time,
rather than a byte at a time.

-c prefix
Chop prefix from matching blank node IDs. This is typically used to revert the effects
of -p. For example, with prefix “doc01”, the blank node _:doc01b42 will be emitted as
_:b42.

-e Eat input one character at a time, rather than a page at a time which is the default.
This is useful when reading from a pipe since output will be generated immediately as
input arrives, rather than waiting until an entire page of input has arrived. With
this option serdi uses one page less memory, but will likely be significantly slower.

-f Fast and loose URI mode: preserve full URIs (without qualifying or making relative),
and pass prefixed names through as-is.

-h Print the command line options.

-i syntax
Read input as syntax. Case is ignored, valid values are: “NQuads”, “NTriples”, “TriG”,
“Turtle”.

-l Lax (non-strict) parsing. If this is enabled, recoverable syntax errors will print a
warning, but parsing will proceed starting at the next statement if possible. Note
that data may be lost when using this option.

-o syntax
Write output as syntax. Case is ignored, valid values are: “NQuads”, “NTriples”,
“TriG”, “Turtle”.

-p prefix
Add prefix to blank node IDs. This can be used to avoid clashes between blank node IDs
in input documents. The effects can be reversed in a later run with -c. For example,
with prefix “doc01”, the blank node _:b42 will be emitted as _:doc01b42.

-q Suppress all output except data.

-r root
Keep relative URIs within a root URI. This will avoid creating any relative URI
references with leading path segments like ../ that enter a parent of root.

For example, if /home/you/file.ttl is written to the file /home/me/output.ttl using the
destination's base URI, then it could be written as <../you/file.ttl>. Setting -r
file:///home/me/ would prevent references from “escaping” like this, so the above would
instead be written as <file:///home/you/file.ttl>, since it can't be expressed relative
to the root URI.

This is useful for keeping relative references within some directory.

-s string
Parse string input instead of a file (terminates options).

-v Display version information and exit.

EXIT STATUS

     serdi exits with a status of 0, or non-zero if an error occurred.

EXAMPLES

     Pretty-print a document:
          serdi -o turtle file.ttl > out.ttl

     Print any errors:
          serdi file.ttl > /dev/null

STANDARDS

     W3C, RDF 1.1 NQuads, February 2014.  https://www.w3.org/TR/n-quads/

     W3C, RDF 1.1 NTriples, February 2014.  https://www.w3.org/TR/n-triples/

     W3C, RDF 1.1 TriG, February 2014.  https://www.w3.org/TR/trig/

     W3C, RDF 1.1 Turtle, February 2014.  https://www.w3.org/TR/turtle/

AUTHORS

     serdi is a part of serd, by David Robillard d@drobilla.net.