An XML schema specifies the structure of an XML document. Refer to www.w3.org/standards/xml/schema and www.w3schools.com/Xml/schema_intro.asp. Popular XML schemas are DITA and DocBook.

Schema are essentially DTDs that are written in XML, instead of the special DTD syntax.

An XML Schema provides a way to define and constrain the data contained in an XML document. XML Schema is the XML-based alternative to DTD.

XML Schema, published as a W3C Recommendation in May 2001, is one of several XML schema languages. It was the first separate schema language for XML to achieve Recommendation status by the W3C. XML Sc [..]

A description of the structure of an XML document. Schemas are written in XSD and support namespaces and data types.

An XML schema is the structural layout of an XML document, expressed in terms of constraints and contents of the document. Constraints are expressed using a combination of the following: Grammatical r [..]

XML Schema lets you define an XML document's contents similarly to DTDs, but XML Schema does not suffer from DTD's shortcomings.

A document used to describe the content, rules, structure, and syntax of an XML document. XML schema was designed by the W3C , and it is intended to replace DTD.

The XML Schema Definition Language is an XML language for describing and constraining the content of XML documents. XML Schema is a W3C Recommendation.

A definition of a specific XML message, which defines the rules of the message governing aspects such as required and optional elements, the order of those elements, and the type of data that can be contained in an element.