68 lines
4.7 KiB
Plaintext
68 lines
4.7 KiB
Plaintext
---+ Results from the Berlin Protocol Meeting
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---+++++ XQuery
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The XqueryLanguage seems not appropiate for now, as not enough free tools are availbale and writing parsers on our own would be too much work and hard to confine.
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---+++++ Changes agreed in Berlin
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Improvement to the SecondProposal:
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* Terminology
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* provider=host: a whole provider software installation
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* datasource=database="collection of objects": a single connected database or a datasubset e.g. visible through a view supporting different ConceptualSchemas
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* resource: a single datasource bound to a single ConceptualSchema
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* AccessPoints
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* for providers supporting all RequestTypes
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* metadata response returns metadata for the provider and all its datasources
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* capabilities response returns ???
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* initially do not merge responses from several datasources, although it might be desireable in the future, esp. for inventories.
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* for datasources supporting all RequestTypes
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* metadata response returns metadata for the provider and this datasource incl all "resources"=schemas with their record numbers
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* capabilities response returns capability of this datasource. that is config&request type capabilities for each resource seperately
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* Header
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* leave request <type> attribute and generically name the element following header for all requests details "message"
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* source repeatable with sequence important and the first source element being the original source
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* source element keeps resource attribute to allow to specify origin of the data. might be repeated for a response of several datasources
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* destination element repeatable to submit distributed queries to several and single providers
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* destination element keeps resource attribute to allow adressing of several datasources within a single request to a provider
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* remove compression element
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* move detailed software/components complex type to provider related capability and just keep the overall versioning with <software name="xxx" version="xyz" BerlinMeetingProposal>
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* RequestTypes
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* PingRequest
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* CapabilitiesRequest
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* MetadataRequest
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* InventoryRequest
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* SearchRequest
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* *open issue:* CustomSearch needed?
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* metadata response, see MetadataProposalTwo
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* drop IPR, insert supported schemas incl record count
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* add logo URL
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* attach date-last-updated to resource
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* capabilities response, see CapabilitiesProposalThree
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* ConceptualBindingProposalOne accepted. OK to use namespace declaration in xml manner. Concept identifier attribute can be called "path".
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* SearchRequest
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* search based on the full/partial search for a single configured ConceptualSchema
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* allows to combine several schemas for a response (to use extension schemas) by specifying a list of qualified concepts instead. See SearchProposalTwo for details.
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* always returns a valid document. in case mandatory data is missing, drop the record or branch. dont use NULLs in response.
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* when requesting no concept at all, return only the mandatory concepts.
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* request the root node of a schema to retrieve the full document
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* allow to ask for BranchNodes to implicitly request all child LeafNodes
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* sorting is not appropiate nor doable
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* specify the top level structure of the search response in the protocol with a slot for metadata and one for the content defined as records.
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* allow the response of multiple "datasets" with different metadata from a single datasource to suit the needs of databases like fishbase and systax
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* allow the
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* allow the metadata definition to be chosen by the provider and make it a mandatory part of the reponse that cannot be altered by any request. Do so for all paging and subsequent responses to the same client.
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* InventoryRequest
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* allow multiple concepts to be scanned
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* optionally request sorting of result list. order by sequence of requested concepts if multiple.
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* valid filter operators
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* Logical: AND, OR, NOT with AND + OR taking multiple arguments while NOT is unary.
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* Comparative: equals, lessThan, lessThanOrEquals, greaterThan, greaterThanOrEquals, like, in, isNull, isMapped
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* filters
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* allow search requests without filters (affects both).
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* evaluate to false if concept is not mapped but compared
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* insert info/warn diagnostic if unmapped concept encountered in request
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* use common Error Codes and prefixes for classification of codes. To be specified in more detail.
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* Using a single POST or GET parameter called "request" which contains either the XML message or an URL pointing to the XML message.
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