Re: generating globally unique triple identifier as IRIs

On 26 July 2018 at 12:42, Melvin Carvalho <melvincarvalho@gmail.com> wrote:

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> On 24 July 2018 at 17:56, thomas lörtsch <tl@rat.io> wrote:
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>> I’m looking for an algorithm to generate identifiers for any possible RDF
>> statements that are themselve IRIs, globally unique, reproducible and not
>> dependend on the source of the statement (i.e. document URI).
>>
>> In other words, the algorithm has to have the following properties:
>> - reproducible: the same triple must always get the same identifier
>> - global: the identifier must be independent from the source of the
>> triple
>>   (a document title, named graph name, graph URI etc)
>> - unique: triples that differ in subject, predicate or object must have
>> different identifiers
>> - conformant: the identifier must be an IRI
>> - autonomous and finite: it can’t rely on any central repository,
>> secondary service etc
>>
>> Does such an algorithm exist? Is it even possible given that each node in
>> the stateent could be an IRI of maximal length and entropy?
>>
>
> surely it's already a unique UUID, modulo white space?
>
> so just separate with spaces and put a . at the end ... am i missing
> something?
>

Ah, you want it to be an IRI

So, what about just putting urn:string: before it?

Or taking a hash and using ni: URIs as per RFC 6920
https://tools.ietf.org/html/rfc6920

The IRIs would need to be expanded.  And a certain treatment for blank
nodes.

I think the JSON LD playground has a normalization algo

https://json-ld.org/playground/

Is that along the right lines?


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>> Thanks,
>> Thomas
>>
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