+### How to specify fields which have to be searched in html templates?
+
+Each query to swish database is consisted of *TWO* fields. Names
+of fields are f[nr] and v[nr] where [nr] is number between 1 and 30.
+
+Value for v field are names of tags in import_xml/*.xml file.
+Value for f field is query which will be sent to swish.
+
+If you need to show index for this field, your submit button should
+have name f[nr]_index.
+
+There are also other fields which are used specially. Best bet is
+to do grep param WebPac.pm. However, you shouldn't need to modify
+any other fields in html templates other than f[nr]* and v[nr].
+If you do, it's a BUG. Please report it to us.
+
+
+### For more documentation, please examine doc/ directory!