XPointer
From Wikipedia, the free encyclopedia.

Xpointer is a system for addressing components of XML based internet media.

At the present time (late 2002), XPointer is divided among four specifications: a "framework" which forms the basis for indentifying XML fragments, a positional element addressing scheme, a scheme for namespaces, and a scheme for XPath-based addressing.

The XPointer language is designed to address structural aspects of XML, including text content and other information objects created as a result of parsing the document. Thus, it could be used to point to a section of a document highlighted by a user through a mouse drag action.

Positional Element Addressing

The element() scheme introduces positional addressing of child elements. This is similar to a simple XPath address, but subsequent steps can only be numbers representing the position of a descendant relative to its branch on the tree.

For instance, given the following fragment

the XPointer to bom would be

element(foo/2/1)

External links

• XML fragments
• Positional element addressing
• Namespacing
• Path based addressing

The original article can be found at: http://en.wikipedia.org/wiki/XPointer.
All text is available under the terms of the GNU Free Documentation License.