The XSLT and XQuery standards were created by different working groups within W3C. The both share the same data model, type system and function library, and both include Xpath 2.0 as a sub language. XQuery was initially created as a query language that would work with large collections of XML documents; it can also work with individual documents. So, its capabilities overlap with XSLT, which was designed to allow input XML documents to be transformed into XML or other formats.
Anyway, there are great differences between these
Short for Extensible Hypertext Markup Language, a hybrid between HTML and XML specifically designed for Net device displays.
XHTML is a markup language written in XML; therefore, it is an XML application.
XHTML uses three XML namespaces (used to qualify element and attributes names by associating them with namespaces identified by URI references. Namespaces prevent identically custom-named tags that may be used in different XML documents from being read the same way), which correspond to three HTML 4.0 DTDs: Strict, Transitional, and
Short for Extensible Hypertext Markup Language, a hybrid between HTML and XML specifically designed for Net device displays.
XHTML is a markup language written in XML; therefore, it is an XML application.
XHTML uses three XML namespaces (used to qualify element and attributes names by associating them with namespaces identified by URI references. Namespaces prevent identically custom-named tags that may be used in different XML documents from being read the same way), which correspond to three HTML 4.0 DTDs: Strict, Transitional, and
RSS/XML