Internal Ant properties
Reference list of Ant properties used by DITA-OT internally.
include.rellinks- A space-separated list of link roles to be output; the 
#defaultvalue token represents links without an explicit role (those for which no@roleattribute is defined). Defined byargs.rellinks, but may be overridden directly. Valid roles include:- parent
 - child
 - sibling
 - friend
 - next
 - previous
 - cousin
 - ancestor
 - descendant
 - sample
 - external
 - other
 
 temp.output.dir.name- An internal property for use with custom transform types; this property can be used to place all output in
            an internal directory, so that a final step in the transform type can do some form of post-processing before
            the files are placed in the specified output directory.
            
For example, if a custom HTML5 transform sets the property to
zip_dir, all output files (including HTML, images, and CSS) will be placed within the directory zip_dir in the temporary processing directory. A final step can then be used to add more files, zip the directory, and return that zip to the designated output directory.