Mar 7, 2017 · In short xmlns means one of two things: (1) xmlns="X" means X is a default namespace; (2) xmlns:pf="X" means that pf is a namespace prefix that can be used as a sort of abbreviation for X. See my concise and complete answer below for the rest of the story –

Oct 15, 2013 · the xmlns attribute specifies the xml namespace for a document. This basically helps to avoid namespace conflicts between different xml documents, if for instance a developer mixes xml documents from different xml applications. An example of this (also from the W3 website): XML data to define an html table:

Sep 3, 2009 · The xmlns attribute has special handling, that allows the declaration of a namespace. All names, such as tag names, in a document belong to a namespace. In the absence of the xmlns attribute all the names belong to the "no name" namespace. Hence:-<root><item /></root>

Jul 6, 2010 · Namespace of aDate element depends on namespace declaration in containing scope. If there is active xmlns="some:namespace" declaration, aDate will have this namespace. Otherwise it will have null namespace. Additionally some XML parsers complain on xmlns="" if there is no active xmlns="some:namespace" declaration to clear...

Dec 10, 2015 · xmlns is part of the W3C Namespaces in XML Recommendation: The prefix xmlns is used only to declare ...

May 9, 2013 · The namespace may change though. This is an external XML feed, which has versioning in the URL of the XMLNS. Is there a way of getting the XMLNS value from the XML so that I can ensure its always the same? –

Dec 22, 2009 · Look at the effbot namespaces documentation/examples; specifically the parse_map function. It shows you how to add an ns_map attribute to each element which contains the prefix/URI mapping that applies to that specific element.

Mar 16, 2017 · xmlns - because the XML Schema is an XML document, it is then possible to define a default XML namespace for the XML file itself (this is what xmlns attribute does); the implications are multiple: authoring, and composition. For example, one does not have to use a prefix for the items defined in the schema, that are later on referenced ...

Apr 29, 2011 · That doesn't answer your question though. Technically, the xmlns attribute is used by the root element of an XHTML document: (according to Wikipedia) The root element of an XHTML document must be html, and must contain an xmlns attribute to associate it with the XHTML namespace.

Aug 22, 2014 · xmlns:xlink says that elements prefixed by xlink should be interpreted using the xlink specification by UAs that understand that specification. xmlns defines the default namespace so no prefixes are necessary for that and you can just write <a> rather than namespace:a and the UA knows it's an SVG <a> element and not a HTML <a> element or some ...