XLink components are the standard method to support hypertext referencing inXML. An XML Schema attribute group, gml:AssociationAttributeGroup, is provided to supportthe use of Xlinks as the method for indicating the value of a property by reference in auniform manner in GML.
The 'actuate' attribute is used to communicate the desired timing of traversal from the starting resource to the ending resource; it's value should be treated as follows:onLoad - traverse to the ending resource immediately on loading the starting resource onRequest - traverse from the starting resource to the ending resource only on a post-loading event triggered for this purpose other - behavior is unconstrained; examine other markup in link for hints none - behavior is unconstrained
The 'show' attribute is used to communicate the desired presentation of the ending resource on traversal from the starting resource; it's value should be treated as follows: new - load ending resource in a new window, frame, pane, or other presentation contextreplace - load the resource in the same window, frame, pane, or other presentation contextembed - load ending resource in place of the presentation of the starting resourceother - behavior is unconstrained; examine other markup in the link for hints none - behavior is unconstrained
<attributeGroup name="AssociationAttributeGroup"><annotation><documentation>XLink components are the standard method to support hypertext referencing in XML. An XML Schema attribute group, gml:AssociationAttributeGroup, is provided to support the use of Xlinks as the method for indicating the value of a property by reference in a uniform manner in GML.</documentation></annotation><attributeGroup ref="xlink:simpleLink"/><attribute name="nilReason" type="gml:NilReasonType"/></attributeGroup>
