The SAS support
http://support.sas.com/ website has a few SUGI/SGF conference papers and technical references on the topic - it will be a matter of user-coded DATA step processing to parse/read the RTF data lines, interpret the commands/data-strings and generate your desired SAS dataset and variables.
Scott Barry
SBBWorks, Inc.
Suggested Google advanced search arguments, this topic/post:
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