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Assume the following XML document:
<root xmlns:foo="...">
<foo:parent>
<child/>
</foo:parent>
</root>
does child element belong to a namespace that corresponds to the prefix foo? Just like in case <foo:child/>?
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An XML namespace is a collection of names that can be used as element or attribute names in an XML document. The namespace qualifies element names uniquely on the Web in order to avoid conflicts between elements with the same name.
Declaring a Default Element Namespace in XQuerydeclare default element namespace "http://www.w3.org/1999/xhtml"; An XQuery program that has this prolog declaration will use the XHTML namespace for all elements where a namespace is not explicitly defined (for example, with a namespace prefix).
Namespaces can be defined for a group to apply to all HTTP, ODBC, XDBC, and WebDAV servers in a group or for a particular HTTP, ODBC, XDBC, or WebDAV server. However, a namespace cannot be defined to apply to a particular forest, database, or XQuery program.
XML namespaces provide a method for qualifying the names of XML elements and XML attributes in XML documents. A qualified name consists of a prefix and a local name, separated by a colon. The prefix functions only as a placeholder; it is mapped to a URI that specifies a namespace.
No. Child nodes do not inherit prefixed namespace by default, and explicit prefix addition needed as you mentioned : <foo:child/>.
But they do inherit ancestor's default namespace (the one without prefix), if any :
<root xmlns:foo="..."> <parent xmlns="bar"> <child/> </parent> </root> <parent> and <child> nodes are in the same namespace which URI is bar.
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