oNVDL version 20070517

This directory contains version 20070517 of oNVDL, an NVDL implementation on top of Jing, a validator for RELAX NG and other schema languages.

The directory bin contains .jar files, ready for use with a a Java runtime.

Version 1.4 of the Java Runtime Environment (JRE), is recommended, which can be downloaded here. Version 1.1 or later should also work, although some functionality may be present only with version 1.2 or later.

oNVDL is a command-line application. Once you have installed JRE 1.4, you can run oNVDL by using the command:

java -jar path-to-dist/onvdl/bin/onvdl.jar file.nvdl file.xml

If file.nvdl is a correct NVDL script and file.xml is valid with respect to file.nvdl, then oNVDL will generate no output. Otherwise, it will generate one or more error messages.

Apart from onvdl.jar, the bin directory contains some third-party jar files, which are used for XML parsing (under a pre-1.4 JRE that does not provide the Java XML parsing extension) and for validating with schema languages other than RELAX NG and NVDL, see doc/onvdl.html for more details.

When you use onvdl.jar with the -jar option, the .jar files mentioned above will be used automatically, provided they are in the same directory as onvdl.jar and provided they have not been renamed. When using the -jar option, the JRE will ignore any additional class path entries specified by the -cp or -classpath options or by the CLASSPATH environment variable.

If you do not want use the -jar option (perhaps because you want to use additional .jar files not shipped with oNVDL), then you must explicitly include all the needed .jar files with a -cp or -classpath option or with the CLASSPATH environment variable, and specify a class name of com.thaiopensource.relaxng.util.Driver. For example, using a Bourne-compatible shell, you could do:

d=path-to-dist/onvdl/bin
CLASSPATH=$d/oNVDL.jar:$d/xercesImpl.jar:$d/xml-apis.jar:$d/saxon.jar:$d/isorelax.jar:$d/log4j.jar
export CLASSPATH
java com.thaiopensource.relaxng.util.Driver file.nvdl file.xml

For more information about the features and usage of oNVDL, see this document.

The source code is in the file src.zip.