XSLT vs Omnimark

I don't know if some of you know Omnimark. It is a streaming
programming language and it works like XSLT but allows to include
programming instructions and can react to many more events (others than
tags).
I want to make use of one of this technology to process an XML file. Do
someone know some pros and cons of both "products" to help me to make a
choice ?

Regards,


 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list