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trang(1) General Commands Manual trang(1)

NAME

trang - convert between different schema languages for XML

SYNOPSIS

trang [-I rng|rnc|dtd|xml] [-O rng|rnc|dtd|xsd] [-i input-param] [-o output-param] input-file ... output-file

DESCRIPTION

trang takes as input a schema written in any of the following formats:

RELAX NG (XML syntax)
RELAX NG (compact syntax)
XML 1.0 DTD

and produces as output a schema written in any of the following formats:

RELAX NG (XML syntax)
RELAX NG (compact syntax)
XML 1.0 DTD
W3C XML Schema

Trang can also infer a schema from one or more example XML documents.

Trang uses an internal representation based on RELAX NG. For each supported input format, there is an input module that converts a schema in that input format into this internal representation. For each supported output format, there is an output module that converts the internal representation into a schema in that output format. Thus, any supported input format can be translated to any supported output format.

Trang requires two command-line arguments: the first is the URI or filename of the schema to be translated; the second is the output filename.

Trang infers the input and output modules to be used from the extension of input and output filenames as follows:

.rng
RELAX NG (XML syntax)
.rnc
RELAX NG (compact syntax)
.dtd
XML 1.0 DTD
.xsd
W3C XML Schema
.xml
XML documents (used as examples from which to infer a schema)

This inference can be overridden using the -I and -O options.

When the input is XML documents used as examples to infer a schema, more than one input file may be specified as arguments. All the input files are specified before the output file.

OPTIONS

Specifies which input module to use.
Specifies which output module to use.
Specifies a parameter for an input (-i) or output (-o) module. The -i and -o options may be used multiple times in order to specify multiple parameters. There are two kinds of parameter: boolean parameters and string-valued parameters. A string-valued parameter is specified using the form name=value. A boolean parameter is specified using the form name or no-name. The applicable parameters depend on the particular input and output module. For details, see the HTML documentation.

SEE ALSO

jing(1)

Trang Manual

http://relaxng.org

AUTHOR

James Clark (jjc@jclark.com)

This product includes software developed by the Apache Software Foundation (http://www.apache.org/).

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