[lp-wan] authorize position 0

[Laurent Toutain <[e-mail]>]

Hi,

I've a  proposal to make for coap compression. We process the same way
uri-path and the uri-query and we have a position field in the rule telling
where we find the elements. For instance

/foo/bar

will generate on a simplified rule containing the FID, the FP and the TV

URI-PATH 1 foo ...
URI-PATH 2 bar

The position is important to avoid confusion with /bar/foo.

But for the query we may not need this order, for instance, it looks that
date=monday&value=max
maybe equivalent to value=max&date=monday

so we may have something like:

URI-QUERY 0 value=
URI-QUERY 0 date=

where a rule will be selected if these 2 elements are present ignoring the
order. The decompressed message will follow the order given by the rule.

What do you think of that change? if you find interest, do we make the
change on -19 or un the coap draft ?

Laurent