Re: Facet algebra

Yannis
>   If I understood correctly, this rule mostly concerns object
>indexing.  Within object indexing  I usually consider (e.g. see my
>paper in ER'2003) indexing statements of the form:   index(1)={Crete,

this is correct... and all the examples were the cases where
the basic classification vocabulary is used to build a 'statements
on content' of a certain information object.

>account during query answering.  Of course this decision depends on
>the application. In any case, the underlying technical issues (for
>query answering) are trivial from a CS point-of-view.
>2/ Filing Order Rules.
>Again the order does not play a critical role  from a CS point-of-
>view.

totally agree about this being trivial on the level of application.
I was only wondering if publishing facetted classification as an independent
namespace what would be the best way of coding citation/filing rules.

>actually facilitates the definition of this kind of rules by giving
>the opportunity to the designer to use both "positive" and "negative"
>rules and by providing a method for inferring new rules  from the
>given (by exploiting the structure and the semantic interpretation
>that is given to the hierarchies).
>Restriction on Synthesis and Rules on Combination Between Facets.
>Without loss of generality we can view RELATORS as terms  and we can
>organize them hierarchically. This means that the  Compound Terms
>Composition Algebra can give a solution to this problem as well, i.e.
>it can make the definition of this kind of rules easy, flexible and
>sharable.

I did not think of treating 'relators'as terms, but having said that
I don't see why not.
I think I should attempt to exploit compound terms algebra if possible.
I have to see how can this be implemented... I may get back to you
after some time.

Also, just in case you may have different view on this... knowledge facetted
classifications are by definition 'precoordinated indexing tools'. This
means
that 'meaningful' coordination/relation between terms is established in the
process of object indexing. Although you can search facet terms using
booleans
it is wise to preserve syntax and relationships as this may reduce recall
and
increase precision in the huge repositories
(this is analogue to the well known examples in using booleans on keywords:
history of philosophy vs. philosophy of history, bibliography of
encyclopaedias
vs. encyclopaedias of bibliography ).

>At last, I would like to say that we shall not confuse XFML with  the
>Compound Terms Composition Algebra. XFML is an XML format for

obviously :-)  thanks ... I did not confuse I was just carried away
with other issues


many thanks again...

Aida





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