Feedback on LDTemplates article

csarven commented 8 years ago

"Ontology as a component ..." -- LDP doesn't mandate other than the minimal LDP vocabulary.
"It is coupled with HTTP ..." -- Specify what makes RDF CRUD different or special handling.
"In order to accommodate..." -- Why is this a bad thing? Not mandating gives some freedom of implementation. That could be a plus or a minus depending how one looks at it. It doesn't forbid SPARQL either.
"It does not offer a ..." -- HTTP PUT/POST, GET, PATCH/POST, DELETE... OPTIONS?
"XSLT is a homoiconic ..." This is one level down implementation specific. What are the alternatives? Can this be abstracted?
"PUT /people/Berners-Lee" -- How is PUT applied to :PersonDocument template?
"is also very scalable" -- Provide benchmarks

namedgraph commented 8 years ago

@csarven thanks for your feedback!

The main problem with LDP is that it does not have an abstract model. The only RDF-related specification that does is SPARQL, which has an algebra. That is more important than freedom of implementation, in our opinion, and that is why we have developed an LDT algebra similar to SPARQL (yet to be made public).

Another problem is that there is no standard way to capture application-specific LDP behaviour. From our point of view, it is not desirable for all Linked Data applications to use the same processing model. Rather, the processing should depend on an app-specific component (ontology), which should be available for interchange using standard means.

Homo-iconicity enables meta-programming, which was one of our goals.

PUT is an Update interaction, which means it generates a SPARQL update consisting of 2 parts: DELETE and INSERT DATA. The DELETE part is taken from ldt:update value and (?this, <http://linkeddatahub.com/people/Berners-Lee>) variable binding is applied. INSERT DATA is generated directly from PUT request body. The combined update request is then executed on the SPARQL service. Does this help?

namedgraph commented 7 years ago

@csarven @timbl @sandhawke would love your opinion on the LDT spec draft :) https://atomgraph.github.io/Linked-Data-Templates/

AtomGraph / Linked-Data-Templates

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