Plain Old XML (POX) is the basic XML, sometimes mixed in with other, blendable specifications like XML Namespaces, Dublin Core, XInclude and XLink. This contrasts with complicated, multilayered XML specifications like those for web services or RDF. The term may have been derived from or inspired by the expression plain old telephone service (POTS) and, similarly Plain Old Java Object (POJO).
An interesting question is how POX relates to XML Schema. On the one hand, POX is completely compatible with XML Schema. However, many POX users eschew XML Schema to avoid the poor or inconsistent quality of XML Schema-to-Java tools.[ citation needed ]
POX is complementary to REST: REST refers to a communication pattern, while POX refers to an information format style.
The primary competitors to POX are more strictly-defined XML-based information formats such as RDF and SOAP section 5 encoding, as well as general non-XML information formats such as JSON and CSV.
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The Semantic Web, sometimes known as Web 3.0, is an extension of the World Wide Web through standards set by the World Wide Web Consortium (W3C). The goal of the Semantic Web is to make Internet data machine-readable.
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An RDF query language is a computer language, specifically a query language for databases, able to retrieve and manipulate data stored in Resource Description Framework (RDF) format.
The Web Services Description Language is an XML-based interface description language that is used for describing the functionality offered by a web service. The acronym is also used for any specific WSDL description of a web service, which provides a machine-readable description of how the service can be called, what parameters it expects, and what data structures it returns. Therefore, its purpose is roughly like a type signature in a programming language.
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