Meeting Notes - 07/02/1996

The followings items were discussed:

1. String comparisons: The options are, "substring" (but case-sensitive) comparison or comparisons that are case-insensitive. Specifically, should a comparison such as is "author" (label value) equal to "Author" (object value) succeed?
2. Parser syntax:
   • Varaiables: start with upper-case letter
   • OID: lower-case
   • Placeholder: $string
3. Semantic checking by parser: We basically agreed that the parser needs more semantic checking. Currently, it does not exit gracefully when encountering a semantically incorrect query. Marcus agreed to look into this problem.
4. New error codes: Every component in TSIMMIS should return its own erorr codes; we need to update the table of codes in tmerror.h. Components inside the wrapper should also return an error string which will be temporarily written out into a file until it can be propagated up to the user/application (dependens on Rohan's addition to SSL/CSL).
5. Predicates: currently only directly supported; no filters with predicates.

Joachim Hammer