Simple search API proposal, take 2

[Mikkel Kamstrup Erlandsen]

About the Simple api:

Picking up on an "old" issue. There was semi-agreement that the properties
to be retrieved from a Query should be passed to GetHits, as GetHits(handle,
offset, limit, props).

Each time I look at this it makes me feel very weird. Are you guys sure this
is what we want? Think about stateless find/grep implementations, ultra
light search daemons... I would guess that at least some servers might
benefit greatly from knowing what fields to extract as soon as possible.

To this end I re-propose to add the props list to the Query constructor.
Giving us an api like:

  Query (xml, props,handle)  --> handle
  GetHits (handle, offset, limit)  --> hits

The most obvious problem is that it leaves the Snippets to be retrieved
along side other properties - which we agreed on was a bad idea. Since each
hit is uniquely determined in a query context by its sequence number, we
could use that to look up additional hit metadata, fx. the snippet. Adding
API like so:

  GetHitMetadata (in s handle, in ai hits, in as props)  --> results

What do you guys say? If you decline again I shall accept it and hold my
peace regarding this issue. Cheers,

Mikkel
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