BasisForChoice
The content of this element is an XPath statement or element-type name identifying information within each NewsComponent or ContentItem that can be used as a basis for choice between equivalent NewsComponents or ContentItems. If the XPath pattern begins with a . character, this represents the 'root' of the XPath and corresponds to the NewsComponent or ContentItem itself. By applying the XPath pattern to each NewsComponent or ContentItem in turn within the set of equivalents, the system can extract the data on the basis of which a choice between the items can be made. If multiple matches to the XPath pattern are present within the subtree that begins at the 'root', only the first match found in document order is significant. The optional Rank attribute allows providers to place a numerical order on the importance they think should be attached to the different bases for choice. Smaller numbers represent higher importance.
Element information
Namespace: http://iptc.org/std/NewsML/2003-10-10/
Schema document: NewsML_1.2.xsd
Type: Anonymous
Properties: Local, Qualified
Content
Attributes
| Name | Occ | Type | Description | Notes |
|---|---|---|---|---|
| Duid | [0..1] | xsd:ID | Duid is a "Document-unique Identifier". It must satisfy the rules for XML ID attributes: it must only contain name characters, and it must start with a name-start character (not a digit). Its value must be unique within any NewsML document. Every NewsML element type has Duid as an optional attribute. Combined with the Identifier element, providing a value for the Duid of any element in a NewsML document makes the element globally identifiable. The Identifier element gives global identification to the document, and the Duid provides local identification for the element within the document. | from group localid |
| Euid | [0..1] | xsd:string | Euid is an "Element-unique Identifier". Its value must be unique among elements of the same element-type and having the same parent element. Use of Euid attribute makes it possible to identify any NewsML element within the context of its local branch of the NewsML document tree. This makes it possible to copy, or include by reference, subtrees into new combinations in ways that would break the uniqueness of Duids (thereby forcing new Duids to be allocated), but still being able to retain the identity of each element. If Euids are maintained at every level, it is possible to identify, for example "The ContentItem whose Euid is abc within the NewsComponent whose Euid is def". Such identification patterns would be preserved even after "pruning and grafting" of subtrees. | from group localid |
| Rank | [0..1] | xsd:positiveInteger |
Used in
- Type NewsComponentType (Element NewsComponent)
Sample instance
<BasisForChoice>string</BasisForChoice>