Case sensitivity and databases

Hi all, I'm about to have a look at the various database related references, to add a little note on case sensitivity where needed. in en/language-snippets.ent there's already &mysql.field-case dealing with this topic. It's stated : <!ENTITY mysql.field-case '<note><simpara>Field names returned by this functionare <emphasis>case-sensitive</emphasis></simpara></note>'> Should I rename this entity to something like database.field-case and use it everywhere, or should I create a new entity for each extension ? Thanx for the suggestions, Mehdi