fn:base-uri
The base URI of a node
Description
The fn:base-uri function finds the base URI of a node. The $arg argument may be any kind of node. If $arg is a document node, this function usually returns the URI from which the document was retrieved. This can also be achieved by the fn:document-uri function.
If $arg is an element, the function returns the value of its xml:base attribute, if any, or the xml:base attribute of its nearest ancestor. If no xml:base attributes appear among its ancestors, it defaults to the base URI of the document node.
If $arg is any other kind of node, the function returns the same value as if the argument were its parent element or document.
This description is © Copyright 2007, Priscilla Walmsley. It is excerpted from the book XQuery by Priscilla Walmsley, O'Reilly, 2007. For a complete explanation of this function, please refer to Appendix A of the book.
Arguments and Return Type
| Name | Type | Description |
|---|---|---|
$arg |
node()? |
the node to find the base URI of, otherwise uses the context node |
| return value | xs:anyURI? |
Examples
let $cats := | doc('http://www.functx.com/input/cats.xml') |
return |
| XQuery Example | Results |
|---|---|
base-uri($cats//catalog[1]) |
http://example.org/ACC/ |
base-uri($cats//catalog[2]/product) |
http://example.org/WMN/ |
base-uri($cats//catalog[2]/product/@href) |
http://example.org/WMN/ |
base-uri($cats) |
http://www.functx.com/input/cats.xml |
base-uri($cats/catalogs) |
http://www.functx.com/input/cats.xml |
See Also
| fn:resolve-uri | Resolves a relative URI to a base URI, returning an absolute URI |
| functx:is-absolute-uri | Whether a URI is absolute |
| fn:static-base-uri | The base URI from the static context |
| fn:document-uri | The URI of a document |
History
| Published On | Last Updated | Contributor(s) |
|---|---|---|
| 2006-06-27 | 2007-02-26 | W3C, XQuery 1.0 and XPath 2.0 Functions and Operators, http://www.w3.org/TR/xpath-functions/ |
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