../code/conceptPage.scroll id twelf name Twelf appeared 2006 creators Frank Pfenning and Carsten Schürmann tags pl rosettaCode http://www.rosettacode.org/wiki/Category:Twelf wikipedia https://en.wikipedia.org/wiki/Twelf summary Twelf is an implementation of the logical framework LF developed by Frank Pfenning and Carsten Schürmann at Carnegie Mellon . It is used for logic programming and for the formalization of programming language theory. backlinksCount 22 pageId 2058228 dailyPageViews 15 appeared 2006