Added further text about allowable thorn/arrangement names

git-svn-id: http://svn.cactuscode.org/flesh/trunk@1960 17b73243-c579-4c4c-a9d2-2d5706c11dac

1 files changed, 13 insertions, 6 deletions

diff --git a/doc/UsersGuide/ThornWriters.tex b/doc/UsersGuide/ThornWriters.tex
index 068c9b9f..38384000 100644
--- a/doc/UsersGuide/ThornWriters.tex
+++ b/doc/UsersGuide/ThornWriters.tex
@@ -45,6 +45,14 @@ The connection from a thorn to the flesh or to other thorns is specified in
 configuration files which are parsed at compile time and used to generate
 glue code which encapsulates the external appearence of a thorn.
 
+Thorn names must be (case independently) unique, must start with a letter, 
+and can only contain 
+letters, numbers or underscores. 
+In addition, a thorn cannot have the name {\t doc}, this is reserved 
+for arrangement documentation. Arrangement names which start with a 
+`\#', or finish with `\~{}' or `.bak' will be ignored.
+
+
 
 \section{Arrangements}
 
@@ -56,15 +64,14 @@ to have separate arrangements for your developments, private and shared
 thorns. 
 
 The arrangements live in the {\tt arrangements} directory off the main 
-Cactus directory.  Arrangement names must be unique, and cannot start 
-with a `\#', or finish
-with `\~{}' or `.bak'.
+Cactus directory.  Arrangement names must be (case independently) unique, 
+must start with a letter, 
+and can only contain 
+letters, numbers or underscores. Arrangement names which start with a 
+`\#', or finish with `\~{}' or `.bak' will be ignored.
 
 Inside a arrangement directory there are directories for each thorn 
 belonging to the arrangement.  
-Thorn names have the same restrictions as arrangement names,
-with the addition that a thorn cannot be called `doc'.  
-This name is reserved for arrangement documentation.
 
 \section{Implementations}