XML::DOM::EntityReference(3pm) User Contributed Perl Documentation XML::DOM::EntityReference(3pm)NAME
XML::DOM::EntityReference - An XML ENTITY reference in XML::DOM
DESCRIPTION
XML::DOM::EntityReference extends XML::DOM::Node.
EntityReference objects may be inserted into the structure model when an entity reference is in the source document, or when the user
wishes to insert an entity reference. Note that character references and references to predefined entities are considered to be expanded by
the HTML or XML processor so that characters are represented by their Unicode equivalent rather than by an entity reference. Moreover, the
XML processor may completely expand references to entities while building the structure model, instead of providing EntityReference
objects. If it does provide such objects, then for a given EntityReference node, it may be that there is no Entity node representing the
referenced entity; but if such an Entity exists, then the child list of the EntityReference node is the same as that of the Entity node. As
with the Entity node, all descendants of the EntityReference are readonly.
The resolution of the children of the EntityReference (the replacement value of the referenced Entity) may be lazily evaluated; actions by
the user (such as calling the childNodes method on the EntityReference node) are assumed to trigger the evaluation.
perl v5.8.8 2008-02-03 XML::DOM::EntityReference(3pm)
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ATTR(1) User Contributed Perl Documentation ATTR(1)NAME
XML::DOM::Attr - An XML attribute in XML::DOM
DESCRIPTION
XML::DOM::Attr extends XML::DOM::Node.
The Attr nodes built by the XML::DOM::Parser always have one child node which is a Text node containing the expanded string value (i.e.
EntityReferences are always expanded.) EntityReferences may be added when modifying or creating a new Document.
The Attr interface represents an attribute in an Element object. Typically the allowable values for the attribute are defined in a docu-
ment type definition.
Attr objects inherit the Node interface, but since they are not actually child nodes of the element they describe, the DOM does not con-
sider them part of the document tree. Thus, the Node attributes parentNode, previousSibling, and nextSibling have a undef value for Attr
objects. The DOM takes the view that attributes are properties of elements rather than having a separate identity from the elements they
are associated with; this should make it more efficient to implement such features as default attributes associated with all elements of a
given type. Furthermore, Attr nodes may not be immediate children of a DocumentFragment. However, they can be associated with Element nodes
contained within a DocumentFragment. In short, users and implementors of the DOM need to be aware that Attr nodes have some things in com-
mon with other objects inheriting the Node interface, but they also are quite distinct.
The attribute's effective value is determined as follows: if this attribute has been explicitly assigned any value, that value is the
attribute's effective value; otherwise, if there is a declaration for this attribute, and that declaration includes a default value, then
that default value is the attribute's effective value; otherwise, the attribute does not exist on this element in the structure model until
it has been explicitly added. Note that the nodeValue attribute on the Attr instance can also be used to retrieve the string version of the
attribute's value(s).
In XML, where the value of an attribute can contain entity references, the child nodes of the Attr node provide a representation in which
entity references are not expanded. These child nodes may be either Text or EntityReference nodes. Because the attribute type may be
unknown, there are no tokenized attribute values.
METHODS
getValue
On retrieval, the value of the attribute is returned as a string. Character and general entity references are replaced with their val-
ues.
setValue (str)
DOM Spec: On setting, this creates a Text node with the unparsed contents of the string.
getName
Returns the name of this attribute.
perl v5.8.0 2000-01-31 ATTR(1)