star

[Bohms, H.M. (Michel)]

Before I start reformulating/simplifying some of my ontologies (including objectifications of values to attach meta-data) to rdf-star…

 

Would TDB support code like:

 

EXAMPLE 9

:a :name "Alice" {| :statedBy :bob ; :recorded "2021-07-07"^^xsd:date |} .

is the same set of triples as:

EXAMPLE 10

<< :a :name "Alice" >> :statedBy :bob .

<< :a :name "Alice" >> :recorded "2021-07-07"^^xsd:date .

:a :name "Alice"

 

 

Small one in case the answer is yes:

 

Would a meta-property get the domain rdf-star:Triple

(can’t find an example anywhere…)

 

Thx Michel

 

Michel Böhms Data Scientist Digital Built Environment (DBE) Mobile +31 630381220 E-mail  michel...@tno.nl Location   This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages.

 

 

[Holger Knublauch]

For general Jena/TDB questions, please ask the jena-users mailing list.

In TopBraid we do not support the ongoing RDF-star implementation of Jena but instead use https://datashapes.org/reification.html

You can see the supported shorthand syntax in the Source Code panel when you for example reify sh:minCount constraints.

Holger

On 17 Mar 2023, at 9:13 am, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

Before I start reformulating/simplifying some of my ontologies (including objectifications of values to attach meta-data) to rdf-star…

 

Would TDB support code like:

 

EXAMPLE 9

:a :name "Alice" {| :statedBy :bob ; :recorded "2021-07-07"^^xsd:date |} .

is the same set of triples as:

EXAMPLE 10

<< :a :name "Alice" >> :statedBy :bob .

<< :a :name "Alice" >> :recorded "2021-07-07"^^xsd:date .

:a :name "Alice"

 

 

Small one in case the answer is yes:

 

Would a meta-property get the domain rdf-star:Triple

(can’t find an example anywhere…)

 

Thx Michel

 

Michel Böhms Data Scientist Digital Built Environment (DBE) Mobile +31 630381220 E-mail  michel...@tno.nl Location

<image001.gif>

This message may contain information that is not intended for you. If you are not the addressee or if this message was sent to you by mistake, you are requested to inform the sender and delete the message. TNO accepts no liability for the content of this e-mail, for the manner in which you use it and for damage of any kind resulting from the risks inherent to the electronic transmission of messages.

 

 

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[Bohms, H.M. (Michel)]

Thx, very helpful!!

 

And interesting approach to just model the reification in a shacl/dash way via meta/provenance shapes.

 

I am only wondering: how does the actual data now look like (like in the Bob/age example stated by Claire)?

(it now only shows the system interface)

 

In case in future the second red is satisfied, would you also going to support it (i.e. do the first red).

RDF* has the following characteristics:

• defines convenient and compact syntaxes for Turtle and SPARQL
• SPARQL* makes it possible to find all refied statements based on individual subjects, predicates or objects
• requires a low-level extension to the RDF data model, and corresponding changes to graph implementations, APIs and tools
• not standardized although some implementations exist, with more being announced

 

 

Thx a lot

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[Holger Knublauch]

RDF-star is still under development. In fact I just looked at the W3C mailing list of the WG that is supposed to standardize RDF-star. At this stage I find it too early to commit to something that may evolve further. It wouldn't be the first time that a WG comes up with some weird compromise solution that makes nobody happy in the end. We have solved the practical use cases with our URI-based reification approach and many customers are using it to get work done. That's good enough for me. There would be significant investment cost for us if we want to support the implementation from Jena because it introduces a completely new node type that would need to be handled, gracefully, in all of our algorithms.

You can see the actual triples when you export to vanilla Turtle, if you're interested in the implementation details.

Holger

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[Bohms, H.M. (Michel)]

Thx, all clear

 

Ps wrt example, I meant the Turtle counterpart for the actual yellow data in:

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[Holger Knublauch]

I invite you to just try it out please.

Holger

On 17 Mar 2023, at 12:01 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

Thx, all clear

 

Ps wrt example, I meant the Turtle counterpart for the actual yellow data in:

<image001.png>

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[Bohms, H.M. (Michel)]

My try is attached.

 

But then….how in tbc:

 

 

Can I add the 2 meta-data items date and author for the age=23?

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[Holger Knublauch]

TBC doesn't support any of this.

Holger

On 17 Mar 2023, at 12:36 pm, 'Bohms, H.M. (Michel)' via TopBraid Suite Users <topbrai...@googlegroups.com> wrote:

My try is attached.

 

But then….how in tbc:

 

<image001.png>

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<tbc-reification.ttl>

[Bohms, H.M. (Michel)]

Ahhhhh 😊

 

So the answer to my first question:

 

“Would TDB support code like: …. “

 

Was simply “no” in the end ……

 

Anyway, thx

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