%might-link-atts;
XLink Linking Attributes for Optional Linking
Used for elements which may link to an external source or to an object within the document, but which do not necessarily act as a link at all. The attribute @xlink:href identifies the object to which the link points.
Model
<!ENTITY % might-link-atts "xmlns:xlink CDATA #IMPLIED xlink:type (simple) #IMPLIED xlink:href CDATA #IMPLIED xlink:role CDATA #IMPLIED xlink:title CDATA #IMPLIED xlink:show (embed | new | none | other | replace) #IMPLIED xlink:actuate (none | onLoad | onRequest | other) #IMPLIED" >