Add guidelines for formatting errcontext strings

diff --git a/doc/src/sgml/sources.sgml b/doc/src/sgml/sources.sgml
index 342f8e4ef73ee741a087fe03b89ecc71fc1f82c5..ec33170f691e4dd99d4bd8b793c10f3ed23ceb95 100644 (file)
--- a/doc/src/sgml/sources.sgml
+++ b/doc/src/sgml/sources.sgml
@@ -1,4 +1,4 @@
-
+
 
  
   PostgreSQL Coding Conventions
@@ -444,6 +444,12 @@ Hint:       the addendum
     inappropriate in other languages).
    
 
+   
+    Error context strings: Do not capitalize the first letter and do
+    not end the string with a period.  Context strings should normally
+    not be complete sentences.
+   
+
    
     Rationale: Avoiding punctuation makes it easier for client applications to
     embed the message into a variety of grammatical contexts.  Often, primary