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The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
The W3C is the main international standards organization for the internet— they provide the W3C Markup Validation Service. Simply copy the full URL of the page to be validated and paste in into the validator. There is also a favelet that you can add to your browser bookmarks that will validate the current page.
dotNetRDF SHACL - an online SHACL validator service written in the .NET Framework [8] [9] pySHACL - an open source SHACL validator library for command line use written in Python [10] SHaclEX - a Scala implementation of both SHACL and ShEx [11] TopBraid SHACL API - an open source implementation of SHACL by TopQuadrant, based on Apache Jena. It ...
The World Wide Web Consortium (W3C) was founded in 1994 by Tim Berners-Lee after he left the European Organization for Nuclear Research in October 1994. [5] It was founded at the Massachusetts Institute of Technology (MIT) Laboratory for Computer Science with support from the European Commission, and the Defense Advanced Research Projects Agency, which had pioneered the ARPANET, the most ...
A validator is a computer program used to check the validity or syntactical correctness of a fragment of code or document. The term is commonly used in the context of validating HTML , [ 1 ] [ 2 ] CSS , and XML documents like RSS feeds, though it can be used for any defined format or language.
The use of the GET or POST method is stated explicitly but can be omitted using the default assumptions stated in the TD specification. It can be seen that the HTTP methods are defined using the "htv:methodName" vocabulary terms. This vocabulary terms for HTTP are included in the TD vocabulary that is found in the "@context" value.
W3C XML Schema is complex and hard to learn, although that is partially because it tries to do more than mere validation (see PSVI). Although being written in XML is an advantage, it is also a disadvantage in some ways. The W3C XML Schema language, in particular, can be quite verbose, while a DTD can be terse and relatively easily editable.
When validating an XML Signature, a procedure called Core Validation is followed. Reference Validation: Each Reference's digest is verified by retrieving the corresponding resource and applying any transforms and then the specified digest method to it. The result is compared to the recorded DigestValue; if they do not match, validation fails.