# Internal Ant properties

DITA-OT uses these Ant properties in certain internal operations. They are not intended for general use, but may be adjusted by plug-in developers to configure custom transform types.

Attention:
Internal properties are subject to change from one version of DITA-OT to another.

`include.rellinks`

  A space-separated list of link roles to be output; the `#default` value token represents links without an explicit role (those for which no `@role` attribute is defined). Defined by `args.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`

  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.