superkaramba, categories, XML

Hi all,

The current CVS version of the superkaramba widget bypasses 
elements.bin/elements.xml and stores everything in an XML data format. It 
also has a category field per element.

In superkaramba/util there is converter script to import old files. E.g. to 
combine two old databases into one xml file with different categories, just 
do:

  python convert.py math/elements.txt math elements.xml
  python convert.py -append bio/elements.txt bio elements.xml

TODO: 

- write my own category-aware adding and editing dialogs. Previously I used 
KMemaid for that, but KMemaid doesn't know about categories.
- add code to activate/deactivate categories.

There is some runtime overhead because Dave doesn't want categories in the 
core, so I have to do some extra book-keeping. What would really help a lot 
(short of implementing categories in the core ;-) ), is a trivial change to 
the core: just add a 'note' string to each element:

struct elem {
        u_short tm_t_rpt;
        char *q, *a;
        char* note;
        ...
}

The core doesn't have to do anything with this field, not even write or save 
it to file. It's just a place where a front-end can park any information it 
wants to attach to an element.

I also attach the dtd I used. It's based on earlier discussions on this list. 
Based on suggestions from the mailing list, I've also tried to shorten the 
names a bit where possible. Any feedback is more than welcome ;-)

Peter

memaid.dtd:

<?xml version="1.0"?>
 <!DOCTYPE memaid [
  <!ELEMENT memaid (category, element)>
  <!ELEMENT category (name)>
  <!ELEMENT name (#PCDATA)>
  <!ELEMENT elem (cat, Q, A)>
  <!ELEMENT cat (#PCDATA)>
  <!ELEMENT Q (#PCDATA)>
  <!ELEMENT A (#PCDATA)>
  <!ATTLIST memaid time_of_start cdata "">
  <!ATTLIST category scheduled cdata ""
                     drill_badly_known cdata "">
  <!ATTLIST elem time_to_rep cdata ""
                 real_last_ivl cdata ""
                 last_ivl cdata ""
                 cur_ivl cdata ""
                 reps cdata ""
                 grade cdata "">
 ]>
 <memaid time_of_start="1063124281">
  <category scheduled="1" drill_badly_known="0">
   <name>
   <![CDATA[<h1>This is the category</h1>]]>
   </name>
  </category>
  <elem time_to_rep="36" last_ivl="6" real_last_ivl="8" cur_ivl="1"
  reps="1" grade ="0">
   <cat>
    <![CDATA[<h1>This is the category</h1>]]>
   </cat>
   <Q>
    <![CDATA[<h1>This is the question</h1>]]>
   </Q>
   <A>
    <![CDATA[<h1>This is the answer</h1>]]>
   </A>
  </elem>
 </memaid>

-- 
------------------------------------------------
Peter Bienstman
Ghent University, Dep. of Information Technology
Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium
tel: +32 9 264 34 45, fax: +32 9 264 35 93
WWW: http://photonics.intec.ugent.be
email: [email protected]
------------------------------------------------



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