Hidden Tags

[Pablo Toapanta]

Hi

I have this HTML code lines:
<input type="hidden" name="imgxy" value="305 208">
 <input type="hidden" name="imgext" value="[mapext]">
 <input type="hidden" name="map" value="[map]">
 <input type="hidden" name="savequery" value="true">
 <input type="hidden" name="program"
value="[program]">
 <input type="hidden" name="map_web_imagepath"
value="[map_web_imagepath]">
 <input type="hidden" name="map_web_imageurl"
value="[map_web_imageurl]">

Could anyone explain me where are defined these tags:
[mapext], [map], etc and all the other tags that are
between "[" and "]"??

Thanks



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