diff --git a/hpvm/docs/hpvm-c.md b/hpvm/docs/hpvm-c.md
index 77bc684b16eb6462d7d61cffbc50f258b454b1f6..36feaa76263f8e2420695394f94d69a92f86a614 100644
--- a/hpvm/docs/hpvm-c.md
+++ b/hpvm/docs/hpvm-c.md
@@ -1,4 +1,9 @@
-# HPVM-C Language
+# HPVM-C Language Specification
+An HPVM program is a combination of host code and one or more data flow graphs (DFG) at the IR level. We provide C function declarations representing the HPVM intrinsics that allow creating, querying, and interacting with the DFGs. More details about the HPVM IR intrinsics can be found in [the HPVM IR Specification.](#hpmv-specification.md).
+
+An HPVM-C program contains both the host and the DFG code. Each HPVM kernel, represented by a leaf node in the DFG, can be compiled to multiple different targets (e.g. CPU and GPU) as described below. 
+
+This document describes all the API calls that can be used in an HPVM-C program.
 
 ## Host API