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+<!--===- docs/ParallelMultiImageFortranRuntime.md
+  
+   Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+   See https://llvm.org/LICENSE.txt for license information.
+   SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+  
+-->
+
+# Multi-Image Parallel Fortran Runtime
+
+
+The Parallel Runtime Interface for Fortran (PRIF) defines an 
+interface designed for LLVM Flang to target implementations of 
+Fortran's multi-image parallel features.
+
+The current revision of the PRIF specification is here:
+<https://doi.org/10.25344/S4CG6G>
+
diff --git a/flang/docs/index.md b/flang/docs/index.md
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@@ -74,6 +74,7 @@ on how to get in touch with us and to learn more about the current status.
    OpenMP-semantics
    OptionComparison
    Overview
+   ParallelMultiImageFortranRuntime
    ParameterizedDerivedTypes
    ParserCombinators
    Parsing