From: ellson <devnull@localhost>
Date: Tue, 18 Oct 2005 21:14:20 +0000 (+0000)
Subject: Add comment to note the command letters the yoix people would like us to
X-Git-Tag: LAST_LIBGRAPH~32^2~7026
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5e0ba3dadd502fe5d1238eb525a385fdbc41433d;p=graphviz

Add comment to note the command letters the yoix people would like us to
avoid in any future extension of the xdot format
---

diff --git a/lib/common/xdgen.c b/lib/common/xdgen.c
index 204b2c44b..540889561 100644
--- a/lib/common/xdgen.c
+++ b/lib/common/xdgen.c
@@ -63,6 +63,14 @@ static int isInvis(char *style)
  * dot, etc. and 
  * these would be the arrow/label positions to use if a user want to flip the 
  * direction of an edge (as sometimes is there want).
+ * 
+ * N.B. John M. asks:
+ *   By the way, I don't know if you ever plan to add other letters for 
+ * the xdot spec, but could you reserve "a" and also "A" (for  attribute), 
+ * "n" and also "N" (for numeric), "w" (for sWitch),  "s" (for string) 
+ * and "t" (for tooltip) and "x" (for position). We use  those letters in 
+ * our drawing spec (and also "<" and ">"), so if you  start generating 
+ * output with them, it could break what we have. 
  */
 void extend_attrs(GVJ_t * job, graph_t *g, int s_arrows, int e_arrows)
 {