ADS insert to named graphs

[Rob Atkinson]

Hi

trying to find examples to understand options for inserting into a named graph..

I have a situation where I need to process a graph and send data to multiple related graphs

ADS offers me the "withDataGraph" that calls a function with no parameters...

seems like it might be relevant to use that and update...

not sure  how I invoke the function I want to call with the parameters I need to send however?  

I can force access to a sparql endpoint as in

https://www.topquadrant.com/doc/7.1/user_guide/working_with_asset_collections/using_sparql_to_query_and_modify_data.html?highlight=insert

might work if all my data is a simply query/insert - in a parameterless function,  but I would like to have the option of manipulating data in ADS and potentially introducing external lookup, validation after transformation and/or human review activities. 

I probably want to use transaction() eventually if I encounter some error. 

What is available -- or if not what approach fits into the EDG architecture best?

[Holger Knublauch]

Hi Rob,

you'll need 7.2 for this, using graph.transaction. Example:

let result = graph.withDataGraph('http://uri.of.example.graph/toUpdate', 'Some log message', () => {
    owl.Thing.add(rdfs.comment, 'Added this comment');
    return 'whatever';
});

This will switch to the first argument as the active graph for the transaction. The second argument can be a log message for the change history. The 3rd argument is the callback function which is the body of the transaction. Here you have the new active graph and can add or delete triples etc. You could also check constraints and decide not to proceed by throwing an exception, i.e. not committing the transaction.

Prior to 7.1 graph.withDataGraph *probably* worked somehow, but that would be a hack and wouldn't properly support transactions etc.

Holger

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[Rob Atkinson]

OK - am on 7.2

I see how that works - for a static function.

If I have a complex function I want to send parameters to,  do I wrap that target function in an anonymous function that passes the parameters I want?

_______________________________________________________   kind regards Rob Atkinson Lead Ontologist, Knowledge Architect at SURROUND Australia Pty Ltd Address   Level 9, Nishi Building, 2 Phillip Law Street; New Acton Canberra Australia 2601 Phone     +61 419 202 973 Email      rob.at...@surroundaustralia.comWebsite   https://www.surroundaustralia.com Enhancing Intelligence Within Organisations delivering evidence that connects decisions to outcomes Copyrights: SURROUND Australia Pty Ltd is the copyright owner of all  original content and attachments. All rights reserved.  Confidentiality Notice: The contents of this e-mail are confidential to the ordinary user  of the e-mail address to which it is addressed, and may also be  privileged. If you are not the addressee of this e-mail, you may  not copy, forward, disclose, or otherwise use it or any part of it  or its attachments in any form whatsoever. If you have received  this e-mail in error, please e-mail the sender by replying to this  message.

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[Holger Knublauch]

On 2022-05-09 5:21 pm, Rob Atkinson wrote:

OK - am on 7.2

I see how that works - for a static function.

If I have a complex function I want to send parameters to,  do I wrap that target function in an anonymous function that passes the parameters I want?

In JavaScript, inner functions can see the variables declared outside, e.g.

let x= 42;
graph.transaction('...', '...', () => {
    owl.Thing.add(rdfs.seeAlso, x);    // x is in scope
})

should work.

Holger

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