1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/doc-src/Logics/abstract.txt	Wed Nov 10 05:00:57 1993 +0100
     1.3 @@ -0,0 +1,8 @@
     1.4 +Isabelle's Object-Logics.  Report 286.
     1.5 +
     1.6 +This is the third of the Isabelle manuals.  It covers Isabelle's built-in
     1.7 +object logics: first-order logic (FOL), Zermelo-Fraenkel set theory (ZF),
     1.8 +higher-order logic (HOL), the classical sequent calculus (LK), and
     1.9 +constructive type theory (CTT).  The final chapter discusses how to define
    1.10 +new logics.  This manual assumes familiarity with Report 280, Introduction
    1.11 +to Isabelle.