What is XSI type?

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 does XSI mean in XML?

XML Schema instance
The prefix “xsi” is the namespace prefix used by convention for the XML Schema instance namespace. XML documents can contain elements that have an xsi:type attribute. This behavior provides an explicit data type for the element. The MRM XML writer is sensitive to xsi:type attributes in the message tree.

Is xmlns mandatory?

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. This is because the namespace “xmlns= is default, and will be added to the tag even if you do not include it.

Is xmlns necessary?

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 does targetNamespace mean in XSD?

In writing XSD schemas, you can use the XSD targetNamespace attribute to specify a target namespace. You can also specify whether the locally declared elements and attributes of the schema should appear qualified by a namespace, either explicitly by using a prefix or implicitly by default.