Actually we are going to migrate the data from docbook to DITA. In docbook they used FOSI as stylesheet to render the PDF. But in DITA we are planning to use XSL/XSL-FO as stylesheets. Will the Publishing Engine supports/read the XSL/XSL-FO that was developed in DITA-OT.
Could you please you guys throw an light in this doubt.
Each XSL-FO implementation (FOP, RenderX, AntennaHouse, Arbortext) is slightly different so you may find the XSL does not work perfectly or needs some updates to work in different environments. DITA-OT stylesheets are designed for Apache FOP so may not work perfectly outside of FOP.
Having said that, PE is extensible and readily allows integration of third party Java classes. Eg. you may be able to call DITA-OT itself from PE to render the FO documents.
Alternatively, PE itself ships with built-in DITA support which should produce PDF of acceptable quality. If you are going to use PE then that would be the easiest path to try first.