Index: src/tag.c
==================================================================
--- src/tag.c
+++ src/tag.c
@@ -423,10 +423,11 @@
 **         takes one of: propagated, singleton, cancel.
 **
 **         Options:
 **           --raw           List tags raw names of tags
 **           --tagtype TYPE  List only tags of type TYPE
+**           -v|--inverse    Inverse the meaning of --tagtype TYPE.
 **
 ** The option --raw allows the manipulation of all types of tags
 ** used for various internal purposes in fossil. It also shows
 ** "cancel" tags for the "find" and "list" subcommands. You should
 ** not use this option to make changes unless you are sure what
@@ -548,12 +549,13 @@
     }
   }else
 
   if(( strncmp(g.argv[2],"list",n)==0 )||( strncmp(g.argv[2],"ls",n)==0 )){
     Stmt q;
-    int fRaw = find_option("raw","",0)!=0;
+    const int fRaw = find_option("raw","",0)!=0;
     const char *zTagType = find_option("tagtype","t",1);
+    const int fInverse = find_option("inverse","v",0)!=0;
     int nTagType = fRaw ? -1 : 0;
     if( zTagType!=0 ){
       int l = strlen(zTagType);
       if( strncmp(zTagType,"cancel",l)==0 ){
         nTagType = 0;
@@ -568,13 +570,13 @@
     if( g.argc==3 ){
       db_prepare(&q,
         "SELECT tagname FROM tag"
         " WHERE EXISTS(SELECT 1 FROM tagxref"
         "               WHERE tagid=tag.tagid"
-        "                 AND tagtype%c%d)"
+        "                 AND tagtype%s%d)"
         " ORDER BY tagname",
-        zTagType!=0 ? '=' : '>',
+        zTagType!=0 ? (fInverse!=0?"<>":"=") : ">"/*safe-for-%s*/,
         nTagType
       );
       while( db_step(&q)==SQLITE_ROW ){
         const char *zName = db_column_text(&q, 0);
         if( fRaw ){
@@ -587,14 +589,14 @@
     }else if( g.argc==4 ){
       int rid = name_to_rid(g.argv[3]);
       db_prepare(&q,
         "SELECT tagname, value FROM tagxref, tag"
         " WHERE tagxref.rid=%d AND tagxref.tagid=tag.tagid"
-        "   AND tagtype%c%d"
+        "   AND tagtype%s%d"
         " ORDER BY tagname",
         rid,
-        zTagType!=0 ? '=' : '>',
+        zTagType!=0 ? (fInverse!=0?"<>":"=") : ">"/*safe-for-%s*/,
         nTagType
       );
       while( db_step(&q)==SQLITE_ROW ){
         const char *zName = db_column_text(&q, 0);
         const char *zValue = db_column_text(&q, 1);