- <blockquote>Declare the xref_value corresponding to the given key as being
-used/no longer used (linked to or unlinked) as the given type. The
-use of these functions is not mandatory, but it can aid in spotting places in the code where xref_value objects are deleted while they are still referenced.<br>
+ <blockquote>Declare
+the xref_value corresponding to the given key as being used/no longer used
+(linked to or unlinked) as the given type. The use of these functions
+is not mandatory, but it can aid in spotting places in the code where xref_value
+objects are deleted while they are still referenced.<br>