How to Customize the DITA Open Toolkit PDF Plugin Output to Remove "on page xx" Text for Cross References
http://wrycan.blogspot.com/2009/02/how-to-customize-dita-open-toolkit-pdf.html

Blogspot
2009

Abstract:

This tutorial uses the DITA Open Toolkit 1.4.2.1 and the corresponding PDF plugin release, and Wrycan's demo text. This assumes you have a working DITA environment and can run the default formatting with PDF plugin.