Does anyone have a "cheat sheet" covering the nomenclature of fields, strings, descriptions, etc used in the various components of Koha? (mysql, perl, inc, tt etc) For example, I would like to add to a "moredetails.pl" prequest a couple more editing possibilities (just like "Lost", "Damaged" and "Withdrawn") such as "Shelving location" (952$c) and 952$g that we use for Fair Market Value. As an example of trying to trace a variable (from additem.pl), the raw data gets transformed/added to during various loops from 952$c and tracing "shelving" from: <div id="subfield952c175402" class="subfield_line" style=""> <label> c - <span id="error13" title="Shelving location">Shelving location</span> </label> <select id="tag_952_subfield_c_166742" class="input_marceditor" size="1" tabindex="1" name="field_value"> <input type="hidden" value="952" name="tag"> <input type="hidden" value="c" name="subfield"> <input type="hidden" value="0" name="mandatory"> </div> which poses as many questions as it answers -- and I'd like to proceed as efficiently as possible. The various online manuals etc do not appear to have a nomenclature / logic flow chart but I am hoping that one of you may have something ready made along these lines I'd also appreciate pointers to the origins of subfield952c175402, error13, tag_952_subfield_c_166742, etc - I'm guessing I could cause a minor disaster in the sql. Thanks and best regards, Paul