The World Wide Web Consortium (W3C) is an international community that works to develop Web standards. The Markup Validation service is offered by the W3C to check the markup validity of Web documents in HTML, XHTML, SMIL, MathML, and more. Developers can use the API to access the functionality of the service and integrate it with their own applications. The API uses SOAP protocol and responses are formatted in XML.
The following is a list of libraries from ProgrammableWeb's Library Directory that matched your search term. Although there many different interpretations of the word "library" among software developers, ProgrammableWeb adheres to a specific definition so as to clearly distinguish libraries from SDKs and frameworks in a way that will facilitate clean search results. In ProgrammableWeb's parlance, the term "library" is strictly used to describe a platform-specific software tool that, when installed, results in the provisioning a specific API. Conversely, SDKs are exclusively for consuming APIs and Frameworks are agnostic to specific APIs. If you think a library, SDK, API, or other asset is missing from our directory, be sure to check our guidelines for making contributions to ProgrammableWeb.