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- > Date: Fri, 13 Nov 92 09:42:56 GMT
- > From: "KHOADLEY" (KHOADLEY at UKACRL) <KHOADLEY@ib.rl.ac.uk>
- ...
- > There seems little reason to me for the ISINDEX tag. Searching consists of
- > two components: the client constructing a list of queries designed to
- > retrieve the relevant information, and the server receving and processing
- > those queries. Once you start to consider a single user initiated search
- > generated multiple queries there seems to be little point in tieing searches
- > down to particular tagged documents.
- > (of course once a search generates multiple queries it can receive multiple
- > replies. AS these replies could come from different servers it becomes the
- > responsibility of the client end to aggregate the replies into something
- > useful to return to the user: a selection panel for instance).
-
- Every seach needs to search SOMETHING. Like it has to search a particular
- database or index. Some servers support thousands of "virtual" indexes. How
- can you express this in a search? The answer is that indexes are names just
- like documents. we then have a convention that if you try to retrieve an index
- as a document, you get back a description of it. This latter is something
- missing for example from WAIS where you have to look up the SOURCE file for a
- database in a totally differents server which may be out of sync (and, being
- centralized, doesn't scale).
-
- If you regard a query as something which is just thrown at the server, then you
- can't allow a ruch enough world of virtual search servers. This was a problem
- with the gopher protocol which causes the Gopher guys to make a
- non-back-compatible sudden change in the protocol spec to introduce an index
- name.
-
-
- > I'd like to see the ISINDEX tag dropped: the client is free to construct
- > whatever queries they wish, using the existing HTTP query mechanism.
- >
-
- > Instead of the ISINDEX tag, I think we need an INPUT tag. ISINDEX is quite
- > used for purposes other than searching, eg. for "smart" documents or
- > to calculate square roots ! (an example familiar to those at the HEPix
- > meeting ...). However using a tag that appears to have been intended for
- > search purpose for something different is confusing to the end user: ie
- > the page asks for the value you wish to square root, whilst the client
- > prompts you for a string to search for ....
- >
-
- > Perhaps the following could be useful:
- > <INPUT VAR=x>Please enter your name</INPUT>
- > <DONEINPUT>
- > ie a series of input fields with associated labels, and a button to say
- > you have finished and now send the query. This opens the possibility
- > of forms based pages generating smart documents. How you send the input is
- > a different matter; maybe:
- > http://somehost.somewhere/some/path?x=xxxx+y=yyyy+z=zzzz
-
- This is the tip of the iceberg. I think the onlywy to do it generally is (see
- my previous message) to have typed queries, and generic editors for them.
- The case above would become something like
- <ISINDEX TYPE="iana:/www/classes/query/personalinfo">
- The type would also be retrievable like a document, and if you had a generic
- query language language, you would get back a description of the query language
- supported. A generic client could use that to generate the form to be filled in
- by a user.
-
- > Kevin Hoadley, Rutherford Appleton Lab, khoadley@ib.rl.ac.uk
- >
-
-
- Tim Berners-Lee
-
-