XML Queries And Transformations

XML

XML Means eXtensible Markup Language.

XML is made to transport as well as store data.

XML is essential to understand and very simple to learn.

XML Queries

1. XQuery is made to be considered a small, easily implementable language.
2. XQuery is flexible enough to query a broad spectrum of XML information sources, including both databases and documents.
3. XQuery identifies the human-readable syntax for that language
4. The fundamental foundation associated with XQuery is the expression
5. XQuery is a functional language
6. XQuery is a strongly-typed language

Different Query Languages For XML

1. XPath And XQL: path expression syntax suitable for hierarchical documents
2. XML-QL: binding variables and utilizing bound variables to create new structures
3. SQL: SELECT-FROM-WHERE pattern for restructuring data
4. OQL: ODMG
5. Quilt: take lots of benefits through over XML query languages and it’s the immediate ancestor of XQuery

XML Transformation Language

An XML transformation language is a programming language created specifically to transform an input XML document into an output XML document which satisfies some specific goal.

There are two special cases of transformation:

XML To XML: The output document is an XML document.

XML To Data: The output document is a byte stream.