> Posted on behalf of John Petit
> >One solution may be to use DTD attributes to cue the search engines.
> >Perhaps a "LEVEL" attribute could cue the searchers to display
> >interfaces to predefined levels. The example below shows that the
> >"LEVEL" attribute means that the "numbeds" element should always appear
> >in a search query, or at the top level or searches. Any elements that
> >did not have this level 1 attribute would not be shown in the search
> >interface. If the "LEVEL" attribute was not found in the DTD, the
> >default would show all of the elements with search fields next to them.
> >
> ><!ELEMENT numbeds (#PCDATA)>
> ><!ATTLIST numbeds
> > XML-SQLTYPE INTEGER #FIXED
> > SNAME CDATA #FIXED "Number of beds"
> > LEVEL CDATA #FIXED "1">
You could generalise this idea so that, instead of giving the level,
you gave the element type name in a different (real or hypothetical
DTD). In other words,
<!ELEMENT numbeds (#PCDATA)>
<!ATTLIST numbeds
general-doc NMTOKEN #FIXED "div1">
In other words, you're saying that the 'numbeds' element corresponds
to 'div1' (first-level division) in the other DTD. This is more
useful, because you can express richer relationships than simply the
level. For example, you could specify that 'expletive-deleted' is a
type of emphasised phrase and that 'city' is a type of name:
<!ELEMENT expletive-deleted (#PCDATA)>
<!ATTLIST expletive-deleted
general-doc NMTOKEN #FIXED "emphasis">
<!ELEMENT city (#PCDATA)>
<!ATTLIST city
general-doc NMTOKEN #FIXED "name">
That way, a user could search for any type of emphasised phrase or
proper noun, no matter what the element type was named.
All the best,
David
--
David Megginson ak117@freenet.carleton.ca
Microstar Software Ltd. dmeggins@microstar.com
http://home.sprynet.com/sprynet/dmeggins/
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