Any compliant implementation must support the W3C XML Schema language, but other languages like RELAX NG or Schematron may be supported as well.
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Unsupported Operation Exception: This parser does not support specification "null" version "null" at parsers.
Document Builder Schema(Unknown Source) at org.xmlcml. Schema Validating Parser1(Schema Test.java:123) This error seems to arise from incompatibilities with XML parsers (such as Xerces) see this post but I have no frameworks (other than Eclipse and Junit). Is there a simple workround (I don't mind what parser I use as long as it validates).
Typically, an application validates XML documents against a list of known schemas as part of its error handling.
Schemas describe the vocabulary: the names of elements, the attributes, and their datatypes (such as integer, string, and date).