URI (XmlDoc/XmlNode function)

Namespace URI of name of selected node (XmlDoc and XmlNode classes)

URI is a member of the XmlDoc and XmlNode classes.

This function gets the "Uniform Resource Identifier" (URI) associated with the name of the node which is the head of an XPath result.

Syntax

%unicode = nr:URI[( [xpath])] Throws XPathError

Syntax terms

%uri

A Unicode string variable for the returned URI. Prior to Sirius Mods version 7.6, this variable is an EBCDIC string.

nr

An XmlDoc or XmlNode, used as the context node for the XPath expression. If an XmlDoc, the Root node is the context node.

XPath

A Unicode string that is an XPath expression which results in a nodelist, The head of the nodelist is the node to process. An optional argument, its default is a period (.), that is, the node referenced by the method object (nr).

Usage notes

• The Uniform Resource Identifier (URI) of a node is defined to be:
  • The URI of the namespace declaration in scope for the prefix of the element-type or attribute name if there is one.
  • The URI of the default namespace declaration in scope for an unprefix of element-type.
  • The null string, otherwise.
• This function may only be used if the XmlDoc's Namespace property is On.
• Namespace-aware applications should use the namespace URI rather than the prefix to identify elements.
• As of Sirius Mods version 7.3, the method's argument and result may include only non-null EBCDIC characters that translate to Unicode. As of Sirius Mods version 7.6, these strings are Unicode or are converted to Unicode. For more information about the effects of this version 7.6 change, see Strings and Unicode.

Example

In the following example, the URI of the first element and the null string are printed:

    Begin
    %d Object XmlDoc
    %d = New
    %n1 Object XmlNode
    %n2 Object XmlNode
    %n1 = %d:AddElement('foo:bar', , 'ftp:here')
    Print 'URI =' And %n1:URI
    %n1 = %n1:AddElement('junk')
    Print 'URI =' And %n1:URI
    End

The example result follows:

    URI = ftp:here
    URI =

Request-Cancellation Errors

• XmlDoc Namespace property not On.
• XPath is invalid.
• Result of (XPath) is empty.
• Insufficient free space exists in CCATEMP.

See Also

• For more information about using XPath expressions, see XPath.
• These methods also obtain information about the name of a node:
  • LocalName
  • Prefix
  • QName