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- lxml is copyright Infrae and distributed under the BSD license (see
- doc/licenses/BSD.txt), with the following exceptions:
- Some code, such a selftest.py, selftest2.py and
- src/lxml/_elementpath.py are derived from ElementTree and
- cElementTree. See doc/licenses/elementtree.txt for the license text.
- lxml.cssselect and lxml.html are copyright Ian Bicking and distributed
- under the BSD license (see doc/licenses/BSD.txt).
- test.py, the test-runner script, is GPL and copyright Shuttleworth
- Foundation. See doc/licenses/GPL.txt. It is believed the unchanged
- inclusion of test.py to run the unit test suite falls under the
- "aggregation" clause of the GPL and thus does not affect the license
- of the rest of the package.
- The isoschematron implementation uses several XSL and RelaxNG resources:
- * The (XML syntax) RelaxNG schema for schematron, copyright International
- Organization for Standardization (see
- src/lxml/isoschematron/resources/rng/iso-schematron.rng for the license
- text)
- * The skeleton iso-schematron-xlt1 pure-xslt schematron implementation
- xsl stylesheets, copyright Rick Jelliffe and Academia Sinica Computing
- Center, Taiwan (see the xsl files here for the license text:
- src/lxml/isoschematron/resources/xsl/iso-schematron-xslt1/)
- * The xsd/rng schema schematron extraction xsl transformations are unlicensed
- and copyright the respective authors as noted (see
- src/lxml/isoschematron/resources/xsl/RNG2Schtrn.xsl and
- src/lxml/isoschematron/resources/xsl/XSD2Schtrn.xsl)
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