This directory contains third-party vocabularies used in these LV2 specifications. They are occasionally very slightly modified for validity, but are otherwise equivalent to their original versions. These are included with LV2 and installed as a bundle to support validation and more intelligent use of data by hosts. The XML schema description in xsd.ttl is an exception, it was mostly hand-crafted since a good description of XSD in RDF did not seem to exist. The way it uses xsd:pattern is questionable, but simple and supported by sord_validate.