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).In most cases, through the attribute works well in small-scale applications, but it becomes increasingly difficult to manage in more distributed environments. The piece of XML to validate is specified in the constructor.With the Open API Spec v3 Draft release, developers can describe a broader range of modern REST APIs in greater detail, including hyperlinks, webhooks, better JSON Schema support, rich examples, and more.At Repre Zen, we're excited and working hard to bring the full range of Open API 3.0's expanded capabilities into the Repre Zen API Studio design experience.Also, the dispute about the most appropriate schema language is ongoing -- is it DTDs, W3C's XML Schema, or OASIS' Relax NG? Yet when you design an XML application, it's even more important to know what to do with the schema.
Validating is useful -- after all, what's the point in processing documents if the application does not recognize the elements?Yet to be of any use, it is important that the application validate against a known schema, which, until JAXP 1.2, was easier said than done.For instance, how do you associate a document to its schema in a portable way?Submit a bug or feature For further API reference and developer documentation, see Java SE Documentation.That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.