+ * Revision 1.38 2001-03-27 23:06:21 adam
+ * Quotes and slashes may occur within attributes.
+ *
+ * Revision 1.37 2001/02/28 09:00:06 adam
+ * Fixed problem with stack overflow for very nested records.
+ *
+ * Revision 1.36 2001/02/21 13:46:53 adam
+ * C++ fixes.
+ *
+ * Revision 1.35 2000/12/05 14:44:25 adam
+ * Readers skips <! ...> sections.
+ *
+ * Revision 1.34 2000/12/05 10:06:23 adam
+ * Added support for null-data rules like <tag/>.
+ *
+ * Revision 1.33 2000/11/29 14:22:47 adam
+ * Implemented XML/SGML attributes for data1 so that d1_read reads them
+ * and d1_write generates proper attributes for XML/SGML records. Added
+ * register locking for threaded version.
+ *
+ * Revision 1.32 2000/01/06 11:25:59 adam
+ * Added case to prevent warning.
+ *
+ * Revision 1.31 1999/12/21 14:16:20 ian
+ * Changed retrieval module to allow data1 trees with no associated absyn.
+ * Also added a simple interface for extracting values from data1 trees using
+ * a string based tagpath.
+ *
+ * Revision 1.30 1999/11/30 13:47:12 adam
+ * Improved installation. Moved header files to include/yaz.
+ *
+ * Revision 1.29 1999/10/21 12:06:29 adam
+ * Retrieval module no longer uses ctype.h - functions.
+ *
+ * Revision 1.28 1999/10/21 09:50:33 adam