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.