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Fix conformance to SPARQL Update / Query's prefix declaration

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#1,788 3 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript, node.js
Domain
api, backend

Research direction

No repository file or test is named. Start by reproducing the PATCH request with Content-Type application/sparql-update and the PREFIX declaration, then compare the parser behavior with rdflib.js issue 651; done means valid PREFIX payloads are accepted while invalid @prefix handling follows the intended SPARQL conformance.

Written by the indexing model from the issue text.

Description

Snippet of an example request:

PATCH https://example.org/test.ttl  HTTP/1.1
Content-Type: application/sparql-update

PREFIX acl: <http://www.w3.org/ns/auth/acl#>

Snippet of an example response:

HTTP/1.1 400 Bad Request
X-Powered-By: solid-server/5.7.11
Accept-Patch: application/sparql-update
Content-Type: text/plain; charset=utf-8
Content-Length: 206

Patch document syntax error: Line 1 of <https://example.org/test.ttl>: Bad syntax:
   Unknown syntax at start of statememt: 'PREFIX acl: <http://'/
   at: "PREFIX acl: <http://www.w3.org/"

AFAICT, https://github.com/linkeddata/rdflib.js/issues/651 captures the issue in that NSS rejects SPARQL Update requests with valid payload using PREFIX (and accepts invalid payload containing @prefix).

Dominant language
JavaScript
Stars
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Forks
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PR merge metrics
No merged PRs in 30d

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