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Subject: Re: [xri] Possible changes to XRI 1.0
Dave McAlpin wrote: Thank you, Dave, for an excellent summary of proposed changes. One omission is the proposal to define '*' as the sole delegation character. This would make parsers easier to write, XRIs easier to read, and plays nicely against the single hierarchy character '/'. But I'll leave further discussion of this point to Drummond. I do have a suggestion and a couple related questions, though. Forgive me if I am missing things that are (clearly?) in the spec as I am still a novice at XRI resolution. > -- New XRIDescriptor elements > > There are several XRID elements added by the trusted res draft that are > potentially useful in standard resolution. We should evaluate and > include as needed. Versioning - As not all resolvers will be updated simultaneously, it seems to me that it would be useful to have a <ProtocolVersion> element that could envelope new (or old) elements and tags. Or is the xmlns tag supposed to be versioned? Service choice - We have found that having e.g. multiple URIs within an XRID might not always provide the best solution to accessing the available service. For example, a broker may require HTTPS for authentication but allow the cheaper HTTP for other services it provides. Is it expected that this issue would be handled by the requester via the service and type tags? Then what happens if the requester is asking for a low-security (HTTP) service but the broker only offers HTTPS for all its services? If the requester could discover this, it could make use of the available HTTPS service rather than having to produce a "service not found" error. Service query - We might want to define a service, perhaps $r*a/QUERY, at which address lies a discovery service (UDDI or something else) that can be queried and which would return the broker's available services. Has this been considered and if so, would this be the proper way to implement it? Thanks, Fen
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