What is xmlns XSI?
xmlns:xsi declares a standard namespace prefix ( xsi ) for a core namespace used in XSD: http://www.w3.org/2001/XMLSchema-instance. XML Schema: Structures also defines several attributes for direct use in any XML documents.
What is XSI and XSD in XML?
The xsi prefix referring to the The Schema Instance Namespace http://www.w3.org/2001/XMLSchema-instance is used in XML document instances for several special attributes defined by the XML Schema Recommendation: xsi:type allows an XML instance to associate element type information directly rather than through an XSD.
What is the meaning of xmlns?
the xml namespace
Definition and Usage The xmlns attribute specifies the xml namespace for a document. Note: The xmlns attribute is required in XHTML, invalid in HTML 4.01, and optional in HTML5. Note: The HTML validator at http://w3.org does not complain when the xmlns attribute is missing in an XHTML document.
How do I include xmlns in XML?
XML Namespaces – The xmlns Attribute When using prefixes in XML, a namespace for the prefix must be defined. The namespace can be defined by an xmlns attribute in the start tag of an element. The namespace declaration has the following syntax. xmlns:prefix=”URI”.
What is XSI type?
The xsi:type attribute is used to indicate to the schema validator that the real type of a particular instance of an element is not the element’s declared type but rather a sub-type derived from the declared type.
What is xmlns XSI http www.w3.org 2001 XML Schema instance?
xmlns:xsi:http://www.w3.org/2001/XMLSchema-instance — Declared in the XML and is used to help declare that the XML document is an instance of and XSD. The convention is to use the namespace prefix of xsi. targetNamespace: is used in the header of the XSD to defined the namespace that the XSD describes.
What is XSI schema?
The xsi:schemaLocation attribute locates schemas for elements and attributes that are in a specified namespace. Its value is a namespace URI followed by a relative or absolute URL where the schema for that namespace can be found. It is most commonly attached to the root element but can appear further down the tree.
Is xmlns required?
Note: The xmlns attribute is only required on the outermost svg element of SVG documents. It is unnecessary for inner svg elements or inside HTML documents.
What is the purpose of xmlns attribute?
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.
Why do we use xmlns?
The xmlns attribute declares an XML Namespace. The Namespaces in XML standard discusses this element in depth. Namespaces are used primarily to avoid conflicts between element names when mixing XML languages.
What is xmlns in XML schema?
In the attribute xmlns:pfx, xmlns is like a reserved word, which is used only to declare a namespace. In other words, xmlns is used for binding namespaces, and is not itself bound to any namespace. Therefore, the above example is read as binding the prefix “pfx” with the namespace “http://www.foo.com.”
What is XSI nil?
Synopsis. The xsi:nil attribute indicates that a certain element does not have a value or that the value is unknown. This is not the same as having a value that is zero or the empty string. Semantically, it is equivalent to SQL’s null.
What is a selectionnamespaces string?
A BSTR string whose value is “SelectionNamespaces”. A VARIANT string containing a space-separated list of namespace declaration attributes.
How do I navigate an XML document in an external namespace?
When an XML document contains elements defined in an external namespace, you must use this property to specify that namespace in order to use DOM methods such as selectNodes or selectSingleNode to navigate the document. This property is supported in MSXML 3.0 and 6.0.
What is namespace declaration in XML?
A VARIANT string containing a space-separated list of namespace declaration attributes. When an XML document contains elements defined in an external namespace, you must use this property to specify that namespace in order to use DOM methods such as selectNodes or selectSingleNode to navigate the document.
Is the setProperty method available with the IXmlDomDocument interface?
the setProperty method is not available with the IXMLDOMDocument interface. A qualified name (QName) is composed of a prefix and a local part. The prefix provides the namespace prefix of the qualified name, and must be associated with a namespace URI.