+ /* string relations, < */
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=1 0", 0));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=1 my", 0));
+
+ /* string relations, <= */
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=2 my", 3));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=2 mn", 0));
+
+ /* = */
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=3 my", 3));
+
+ /* string relations, >= */
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=4 x", 2));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=4 tu", 2));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=4 title", 3));
+
+ /* string relations, > */
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=5 x", 0));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=5 tu", 2));
+ YAZ_CHECK(tl_query(zh, "@attr 1=4 @attr 2=5 title", 2));
+
+