Revisit empty string as term · Issue #584 · json-ld/json-ld.org · GitHub
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Revisit empty string as term #584

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gkellogg opened this issue Feb 2, 2018 · 3 comments
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Revisit empty string as term #584

gkellogg opened this issue Feb 2, 2018 · 3 comments
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defer Issue deferred to future Working Group spec-editorial syntax

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@gkellogg
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gkellogg commented Feb 2, 2018

JSON-LD has a restriction that terms must not be the empty string

From JSON-LD Syntax 6.1:

Furthermore, the term MUST NOT be an empty string ("") as not all programming languages are able to handle empty JSON keys.

IIRC, this was added due to an issue in an earlier version of PHP, and I suspect it is no longer an issue. Furthermore, the use of empty prefixes is common in other RDF syntaxes, so allowing it here for 1.1 documents would be reasonable, if tooling supports it.

As evidence, consider this stackoverflow question.

Also, note that while the syntax document makes such a normative statement, the API algorithms don't call this out as an error condition.
@gkellogg gkellogg added this to the JSON-LD 1.1 milestone Feb 2, 2018
@azaroth42
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@dlongley traced this issue back here:

#480 (comment)

I think the bigger question is around semantics of its use in the various places it might be used.

@gkellogg gkellogg added defer Issue deferred to future Working Group and removed under-review labels Apr 4, 2018
@gkellogg gkellogg removed this from the JSON-LD 1.1 milestone Apr 9, 2018
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gkellogg commented Apr 9, 2018

Deferred to WG due to https://json-ld.org/minutes/2018-04-10/#resolution-3.

@gkellogg gkellogg mentioned this issue Jun 30, 2018
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@gkellogg
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Closed in favor of w3c/json-ld-syntax#12.

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