rdfapi-php-interest — general forum for RAP feature requests, bug reports, patches, and use cases

Re: [Rdfapi-php-interest] Database load times

[Jonathan H. <hen...@ya...>]

There are a couple parameters you can change that I know of in the 
php.ini file. Sorry, if I misunderstand your question.

---
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;
 
max_execution_time = 6000 ; Maximum execution time of each script, in 
seconds
max_input_time = 600        ; Maximum amount of time each script may 
spend parsing request data
memory_limit = 32M      ; Maximum amount of memory a script may consume 
(8MB)
---

Also depending on how the data is sent - you may also want to change:

upload_max_filesize = 16M

or
 
post_max_size = 16M


Setting in a script using ini_set() will not work, I think, but you may 
want to verify that.

I also use PHPMyAdmin for some tasks, and it also has it's own execution 
times in the config file.

4000 triples seems pretty small to me. I have loaded Wordnet on several 
occasions.

Hope this helps.


Peter Boot wrote:

> Hi all,
>
> I am loading a 4000 triple RDF file into a database model. I found out 
> about the stream parameter (thank you for the list archive), but still 
> I need to change the php 30 second max execution time parameter in 
> order to complete the process. I anticipate my files may get to be a 
> hundred times larger than this, so I expect some trouble.
>
> Can anyone give more information about database load execution times?
>
> Best regards,
> Peter
>
>
>
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[Rdfapi-php-interest] Database load times

[Peter B. <pb...@xs...>]

Hi all,

I am loading a 4000 triple RDF file into a database model. I found out 
about the stream parameter (thank you for the list archive), but still I 
need to change the php 30 second max execution time parameter in order 
to complete the process. I anticipate my files may get to be a hundred 
times larger than this, so I expect some trouble.

Can anyone give more information about database load execution times?

Best regards,
Peter

[Rdfapi-php-interest] [Fwd: [jena-dev] regular expressions in RDQL?]

[Richard C. <ric...@hp...>]

FYI: As someone pointed out on jena-dev, regular expressions are written
like this in Jena's RDQL implementation:

AND ?x =~ /regex/

In RAP's implementation, it would be (according to the tutorial):

AND ?x =~ "/regex/"

I don't think anything has to be done about it, but you should be aware
of the issue.

Richard



-------- Forwarded Message --------
From: abelssoft <Ne...@ab...>
Reply-To: jen...@ya...
To: jen...@ya...
Subject: [jena-dev] regular expressions in RDQL?
Date: Fri, 27 May 2005 12:41:33 -0000
Hi guys,

we wanted to use the ~~ or =~ in an RDQL for using regular expressions.

Logically, I would assume that we need to write something like this:

 SELECT ?id
 WHERE (?x, <ns:id>, ?id)
...
 AND ?name ~~ "demoname"
 USING ns for <http://www.test.com/test#>

However: In my Java-Implementation, Jena said that we should remove
the quotes and so does your tutorial at
http://jena.sourceforge.net/tutorial/RDQL/index.html

However: In all other cases, Strings are used WITH quotes and if we
remove the quotes then how do we use white spaces???

In the W3C-website at http://www.w3.org/Submission/RDQL/#prod25
it sais:
STR_MATCH  	         ::=   	'=~' | '~~'
StringEqualityExpression ::= ...<STR_MATCH> PatternLiteral ...
PatternLiteral 	         ::=  	
(nothing on the left side) :-(


Furthermore, there is another API for rdql that uses quotes:
http://www.wiwiss.fu-berlin.de/suhl/bizer/rdfapi/tutorial/rdql_tutorial.htm

So what is correct?



Best greetings,

Sven




 
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Re: [Rdfapi-php-interest] [Fwd: ]

[Richard C. <ri...@cy...>]

Hi Christian,

Am 28.05.2005 um 09:13 schrieb Christian Boulanger (Bibliograph  
Development):
> another newbie question. How do I get raw XML from a model via a  
> method?

What do you mean by the "raw XML" of a model? A model is just a bunch  
of statements. There are different formats for writing a model into a  
string. RDF/XML and N3 are the most popular, and there are others  
like NTriples and TriX. I guess you want the statements of your model  
in RDF/XML format?

> There is saveAs() to save it to a file, writeAsHtml() to get it  
> hmtlentitized, and writeAsHtmlTable to have a table. What if I only  
> need the XML string to output it later with header("Content-Type:  
> text/xml")? Did I miss something here?

$model->writeRdfToString() might do what you want.

Note that RDF/XML has its own MIME type, application/rdf+xml, and  
using that is usually more appropriate than text/xml.

Richard


>
> Thanks,
>
> Christian
>
> Christian Boulanger wrote:
>
>
>> Hallo,
>>
>> I am new to RDFAPI-PHP but very impressed by the careful design  
>> and the
>> good documentation. I am stuck with a problem, however, and  
>> thought you
>> might be able to help me:
>>
>> I have a hierarchical folder structure in my database which I want to
>> display in a Mozilla XUL Tree Widget that can natively use the RDF  
>> as a
>> datasource.
>>
>> $db     = $rdf->getNewModel($datasource);
>> $dbRes  = new ResModel($db);
>>
>> if I create a root sequence like so:
>>
>> $treeRootSeq  = $dbRes->createSeq("urn:bibliograph:folder#root");
>>
>> and programmatically add members of the sequence:
>>
>> $folderRes      =
>> $dbRes->createResource("urn:bibliograph:folder#(newFolderId goes  
>> here)"); $treeRootSeq->add( $folderRes );
>>
>> the generated RDF looks like this:
>>
>> <rdf:Description rdf:about="urn:bibliograph:folder#root">
>> <rdf:_2
>> rdf:resource="urn:bibliograph:folder#89e51c22d059c6abde622855aa7f5321 
>> "/>
>> </rdf:Description>
>>
>> ....
>>
>> <rdf:Seq
>> rdf:about="urn:bibliograph:folder#828679db024d9dc591676782c63b949d">
>> <rdf:_1
>> rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f 
>> "/>
>> <rdf:_2
>> rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f 
>> "/>
>> <rdf:_3
>> rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50 
>> "/>
>> </rdf:Seq>
>>
>> What I would like to have, however, is this:
>>
>> <rdf:Description rdf:about="urn:bibliograph:folder#root">
>>   <rdf:Seq>
>>       <rdf:li
>> rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f 
>> "/>
>>       <rdf:li
>> rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f 
>> "/>
>>       <rdf:li
>> rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50 
>> "/>
>>    </rdf:Seq>
>> </rdf:Description>
>>
>> How do I have to code this?
>>
>> Thanks,
>>
>> Christian
>>
>>
>>
>>
>>
>>
>> -------------------------------------------------------
>> This SF.Net email is sponsored by Yahoo.
>> Introducing Yahoo! Search Developer Network - Create apps using  
>> Yahoo!
>> Search APIs Find out how you can build Yahoo! directly into your own
>> Applications - visit http://developer.yahoo.net/?fr=offad-ysdn- 
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>> _______________________________________________
>> Rdfapi-php-interest mailing list
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>> https://lists.sourceforge.net/lists/listinfo/rdfapi-php-interest
>>
>>
>
> -- 
> Bibliograph: Open Source On-line Reference Management
>
> http://www.bibliograph.org
> Email: in...@bi...
>
>
>
> -------------------------------------------------------
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> _______________________________________________
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>
>

Re: [Rdfapi-php-interest] [Fwd: ]

[Christian B. (B. Development) <in...@bi...>]

Hello,

another newbie question. How do I get raw XML from a model via a method? 
There is saveAs() to save it to a file, writeAsHtml() to get it 
hmtlentitized, and writeAsHtmlTable to have a table. What if I only need 
the XML string to output it later with header("Content-Type: text/xml")? 
Did I miss something here?

Thanks,

Christian

Christian Boulanger wrote:

>Hallo,
>
>I am new to RDFAPI-PHP but very impressed by the careful design and the
>good documentation. I am stuck with a problem, however, and thought you
>might be able to help me:
>
>I have a hierarchical folder structure in my database which I want to
>display in a Mozilla XUL Tree Widget that can natively use the RDF as a
>datasource.
>
>$db     = $rdf->getNewModel($datasource);
>$dbRes  = new ResModel($db);
>
>if I create a root sequence like so:
>
>$treeRootSeq  = $dbRes->createSeq("urn:bibliograph:folder#root");
>
>and programmatically add members of the sequence:
>
>$folderRes      =
>$dbRes->createResource("urn:bibliograph:folder#(newFolderId goes here)"); 
>$treeRootSeq->add( $folderRes );
>
>the generated RDF looks like this:
>
><rdf:Description rdf:about="urn:bibliograph:folder#root">
><rdf:_2
>rdf:resource="urn:bibliograph:folder#89e51c22d059c6abde622855aa7f5321"/>
></rdf:Description>
>
>....
>
><rdf:Seq
>rdf:about="urn:bibliograph:folder#828679db024d9dc591676782c63b949d">
><rdf:_1
>rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
><rdf:_2
>rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
><rdf:_3
>rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
></rdf:Seq>
>
>What I would like to have, however, is this:
>
><rdf:Description rdf:about="urn:bibliograph:folder#root">
>   <rdf:Seq>
>       <rdf:li
>rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
>       <rdf:li
>rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
>       <rdf:li
>rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
>    </rdf:Seq>
></rdf:Description>
>
>How do I have to code this?
>
>Thanks,
>
>Christian
>
>
>
>
>
>
>-------------------------------------------------------
>This SF.Net email is sponsored by Yahoo.
>Introducing Yahoo! Search Developer Network - Create apps using Yahoo!
>Search APIs Find out how you can build Yahoo! directly into your own
>Applications - visit http://developer.yahoo.net/?fr=offad-ysdn-ostg-q22005
>_______________________________________________
>Rdfapi-php-interest mailing list
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>https://lists.sourceforge.net/lists/listinfo/rdfapi-php-interest
>  
>

-- 
Bibliograph: Open Source On-line Reference Management

http://www.bibliograph.org
Email: in...@bi...

[Rdfapi-php-interest] [Fwd: ]

[Christian B. <in...@bi...>]

Hallo,

I am new to RDFAPI-PHP but very impressed by the careful design and the
good documentation. I am stuck with a problem, however, and thought you
might be able to help me:

I have a hierarchical folder structure in my database which I want to
display in a Mozilla XUL Tree Widget that can natively use the RDF as a
datasource.

$db     = $rdf->getNewModel($datasource);
$dbRes  = new ResModel($db);

if I create a root sequence like so:

$treeRootSeq  = $dbRes->createSeq("urn:bibliograph:folder#root");

and programmatically add members of the sequence:

$folderRes      =
$dbRes->createResource("urn:bibliograph:folder#(newFolderId goes here)"); 
$treeRootSeq->add( $folderRes );

the generated RDF looks like this:

<rdf:Description rdf:about="urn:bibliograph:folder#root">
<rdf:_2
rdf:resource="urn:bibliograph:folder#89e51c22d059c6abde622855aa7f5321"/>
</rdf:Description>

....

<rdf:Seq
rdf:about="urn:bibliograph:folder#828679db024d9dc591676782c63b949d">
<rdf:_1
rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
<rdf:_2
rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
<rdf:_3
rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
</rdf:Seq>

What I would like to have, however, is this:

<rdf:Description rdf:about="urn:bibliograph:folder#root">
   <rdf:Seq>
       <rdf:li
rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
       <rdf:li
rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
       <rdf:li
rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
    </rdf:Seq>
</rdf:Description>

How do I have to code this?

Thanks,

Christian

[Rdfapi-php-interest] (no subject)

[<bib...@15...>]

Hallo,

I am new to RDFAPI-PHP but very impressed by the careful design and the
good documentation. I am stuck with a problem, however, and thought you
might be able to help me:

I have a hierarchical folder structure in my database which I want to
display in a Mozilla XUL Tree Widget that can natively use the RDF as a
datasource.

$db     = $rdf->getNewModel($datasource);
$dbRes  = new ResModel($db);

if I create a root sequence like so:

$treeRootSeq  = $dbRes->createSeq("urn:bibliograph:folder#root");

and programmatically add members of the sequence:

$folderRes      =
$dbRes->createResource("urn:bibliograph:folder#(newFolderId goes here)"); 
$treeRootSeq->add( $folderRes );

the generated RDF looks like this:

<rdf:Description rdf:about="urn:bibliograph:folder#root">
<rdf:_2
rdf:resource="urn:bibliograph:folder#89e51c22d059c6abde622855aa7f5321"/>
</rdf:Description>

....

<rdf:Seq rdf:about="urn:bibliograph:folder#828679db024d9dc591676782c63b949d">
<rdf:_1
rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
<rdf:_2
rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
<rdf:_3
rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
</rdf:Seq>

What I would like to have, however, is this:

<rdf:Description rdf:about="urn:bibliograph:folder#root">
   <rdf:Seq>
       <rdf:li
rdf:resource="urn:bibliograph:folder#92eb042f602b699051344f1b2e25c12f"/>
       <rdf:li
rdf:resource="urn:bibliograph:folder#6c00094831008383d4e1b9cba22bf30f"/>
       <rdf:li
rdf:resource="urn:bibliograph:folder#48a124b55bfa09881264c0342d419a50"/>
    </rdf:Seq>
</rdf:Description>

How do I have to code this?

Thanks,

Christian

[Rdfapi-php-interest] sameAs support in OntModel

[rudy r. <rus...@gm...>]

hi everyone,

does the RAP's OntModel support owl:sameAs for classes or instances ?
I tried to use it sameAs because I saw it being listed in the 
OntResource section from this link

http://www.wiwiss.fu-berlin.de/suhl/bizer/rdfapi/tutorial/usingtheOntModelAPI.htm

cheers
rudy

Re: [Rdfapi-php-interest] Literal from a particular language in RDQL

[Richard C. <ri...@cy...>]

Hi,

Am 23.05.2005 um 09:21 schrieb Seaborne, Andy:
>> From: Charles Nepote <>
>> I am trying to query the label of a resource in a particular =20
>> language.
>>
>> SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z@fr) USING
>> rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>
>> --> error
>>
>> SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z) AND ?=20
>> z =3D~
>> "/@fr/"
>> USING rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>
>> --> "no match"
>>
>> Any ideas ?
>> See the discussion here :
>> http://ilrt.org/discovery/chatlogs/swig/2005-05-20.html#T23-24-35
>>
>> ---
>> Charles Nepote
>
> It's "langeq" - it was added very late to RDQL and I don't know how
> widely it is implemented.
>
> AND ?z langeq "fr"
>
> Which extracts the lang tag and does a language match:
>
> AND  "foo"@en-gb langeq "en"

I guess RAP doesn't support langeq.

This is the Jena implementation of langeq:

http://cvs.sourceforge.net/viewcvs.py/jena/jena2/src/com/hp/hpl/jena/=20
rdql/parser/Q_StringLangEqual.java?rev=3DHEAD&view=3Dauto

The rawEval function is the interesting part.

> In SPARQL, it is approximately (the regex could be better):
>
> FILTER regex(lang(?z), "^fr", "i")

With subtag match:

FILTER REGEX(LANG(?label), '^fr(-|$)', 'i')

See also:
http://dowhatimean.net/2005/05/the-semantic-web-and-languages-that-=20
are-not-english

Richard



> And better still
>
> FILTER ext:lang(?z, "fr") for a custom extension.
>
>     Andy
>
>
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>
>

RE: [Rdfapi-php-interest] Literal from a particular language in RDQL

[Seaborne, A. <and...@hp...>]

-------- Original Message --------
> From: Charles Nepote <>
> Date: 21 May 2005 01:00
>=20
> Hi,
>=20
> I am trying to query the label of a resource in a particular language.
>=20
> SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z@fr) USING
> rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>=20
>=20
> --> error
>=20
>=20
> SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z) AND ?z =
=3D~
> "/@fr/"=20
> USING rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>
>=20
> --> "no match"
>=20
> Any ideas ?
> See the discussion here :
> http://ilrt.org/discovery/chatlogs/swig/2005-05-20.html#T23-24-35
>=20
> ---
> Charles Nepote


It's "langeq" - it was added very late to RDQL and I don't know how
widely it is implemented.

AND ?z langeq "fr"

Which extracts the lang tag and does a language match:

AND  "foo"@en-gb langeq "en"=20

In SPARQL, it is approximately (the regex could be better):

FILTER regex(lang(?z), "^fr", "i")

And better still

FILTER ext:lang(?z, "fr") for a custom extension.

	Andy

[Rdfapi-php-interest] Literal from a particular language in RDQL

[Charles N. <cha...@ne...>]

Hi,

I am trying to query the label of a resource in a particular language.

SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z@fr) USING rdf=
s FOR
<http://www.w3.org/2000/01/rdf-schema#>

--> error


SELECT ?z WHERE (<http://example.org/ex#id>, rdfs:label, ?z) AND ?z =3D~ =
"/@fr/"
USING rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>

--> "no match"

Any ideas ?
See the discussion here :
http://ilrt.org/discovery/chatlogs/swig/2005-05-20.html#T23-24-35

---
Charles Nepote

Re: [Rdfapi-php-interest] inference support in ontModel

[Jonathan H. <hen...@ya...>]

Yes, but only if you ask for it, as with any RAP "model" by using a 
syntax when you create a model using the model factory

$model = ModelFactory::getOntModel('InfModelF', $modelURI);
same with the getResModel 
<http://www.wiwiss.fu-berlin.de/suhl/bizer/rdfapi/phpdoc/model/ModelFactory.html#getResModel> 
function.
You can also pass memory models into other models to get inference.


rudy rusli wrote:

>hi, i'm trying to use inference support in Ontology Model, but does
>ontModel has inference support just like in the Inference Model ?,
>
>regards
>rudy rusli
>
>
>-------------------------------------------------------
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>
>  
>

[Rdfapi-php-interest] inference support in ontModel

[rudy r. <rus...@gm...>]

hi, i'm trying to use inference support in Ontology Model, but does
ontModel has inference support just like in the Inference Model ?,

regards
rudy rusli

[Rdfapi-php-interest] RDQL Inference basic question

[Jonathan H. <hen...@ya...>]

Hello again all,

I need some help understanding an inference query. I am confused by the
results of a query on an inference model - both forward and backward chaining. 

In both forward and backward chaining when I use the inference model 
and I send an RDQL message for a instances of a class , it also gives me 
instances of a superclass. It may be because of my query - but I thought the 
rdf:type would prevent that.

The behaviour I expect is that if Person is a subclass of Mammal, that  
if I ask for type:Person I should get no Mammals. Conversly, if I ask for 
Mammals, I should also get Persons.

Here is the RDQL:

SELECT ?Persons
WHERE (?Persons, rdf:type, ns:Person)  
USING
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
ns FOR <http://newscup.net/ns#>
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>

Should I be using "find()" instead?
Apologies if this is an obvious question.

(I am resending as it didn't show yesterday)

[Rdfapi-php-interest] RDQL - Confused by Inference

[Jonathan H. <hen...@ya...>]

Hello again all,

I need some help understanding an inference query. I am confused by the
results of a query on an inference model - both forward
and backward chaining. 

In both forward and backward chaining when I use the inference model and I
send an RDQL message for a instances of a class , it also gives me instances
of a superclass. It may be because of my query - but I thought the rdf:type
would prevent that.

The behaviour I expect is that if Person is a subclass of Mammal, that if I
ask for type:Person I should get no Mammals. Conversly, if I ask for Mammals,
I should also get Persons.

Here is the RDQL:

SELECT ?Persons
WHERE (?Persons, rdf:type, ns:Person)  
USING
rdf FOR <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
ns FOR <http://newscup.net/ns#>
rdfs FOR <http://www.w3.org/2000/01/rdf-schema#>

Should I be using "find()" instead?
Apologies if this is an obvious question.

Re: [Rdfapi-php-interest] using replace, bug?

[Jonathan H. <hen...@ya...>]

I can achieve the desired results  - which is an update using

      $model3->remove(new Statement($subject , $predicate, $object));
       $model3->add(new Statement($subject , $predicate, $newObject));


Of course this is not handled as a complete transaction, and it could remove
without adding, or visa versa. No way to add a rollback, or undo (which would
be nice)


So, is replace functionally equivilent? It appears not because the $newObject
will replace anything unless it is null. It correctly finds the objects I am
seeking, but replaces $subject and $predicate too.

perhaps another handy function would only replace the object


in mem model for example (untested)

foreach($this->triples as $key => $value) {
    if (
         ($this->triples[$key]->subj->equals($subject)) and
         ($this->triples[$key]->pred->equals($predicate)) and
         ($this->triples[$key]->obj->equals($object)) 
       )
			$this->triples[$key]->obj = $replacement;

}












--- Jonathan Hendler <hen...@ya...> wrote:
> Why is the replace function disabled in the INF modes?
> 
> I also get an error when using replace on a DB model - 
> 
> "Fatal error: RDFAPI error (class: DbModel; method: find): Parameter
> mismatch
> in [my include path]/rdfapi-php/api/model/DbModel.php on line 669"
> 
> occurs with :
> 
> foreach ($result as $object)
> {
>   
>    $subject = $object['?subject']->uri;
>    $predicate = $object['?predicate']->uri;
>    $object = $object['?object']->label; // (assuming this is a literal)
>      
>      $newObject = $model->createLiteral(5); 
>      $dbModel->replace($subject , $predicate, $object, $newObject);
>       
> } 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: NEC IT Guy Games.
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> 

[Rdfapi-php-interest] using replace, bug?

[Jonathan H. <hen...@ya...>]

Why is the replace function disabled in the INF modes?

I also get an error when using replace on a DB model - 

"Fatal error: RDFAPI error (class: DbModel; method: find): Parameter mismatch
in [my include path]/rdfapi-php/api/model/DbModel.php on line 669"

occurs with :

foreach ($result as $object)
{
  
   $subject = $object['?subject']->uri;
   $predicate = $object['?predicate']->uri;
   $object = $object['?object']->label; // (assuming this is a literal)
     
     $newObject = $model->createLiteral(5); 
     $dbModel->replace($subject , $predicate, $object, $newObject);
      
} 

[Rdfapi-php-interest] remove, replace

[Jonathan H. <hen...@ya...>]

Problem:
I want the mimic Update and Delete functionality present in SQL. 

For example, imagine an RDFS class that has a multiple cardinality property -
like FOAF:knows. If George knows 10 people and I want to remove 5 of them
based on a search - i would do an RDQL query first and then pass the results
to the remove function called 5 times in a loop. (inefficient, but I am not
aware of another solution)
Removing single statement seems trivial enough.

Update seems to be less friendly. 
If 5 out of  George's 10 friend's phone numbers have all changed this would
be easy if I do the same as above using replace:

foreach (rdqlqueryresult)
{
  replace($friend, FOAF:hasphone, ?anyoldPhoneNumberY, $newphonenumber)
}

The problem is when ?anyoldPhoneNumber is also a multiple cardinality item.
In this case I need to know the the previous result I want to replace. 

foreach (rdqlqueryresult)
{
  replace($friend, FOAF:hasphone, $specificPhoneNumber, $newphonenumber)
}

So this all seems a bit hackish. But generally is this the way I should
proceed to get the update and delete functionality?

[Rdfapi-php-interest] Editor support

[Jonathan H. <hen...@ya...>]

The inference engines of RAP do basic inference with a standard RDFS -  
but, for example, SWOOP OWL and Protege RDFS uses a different namespace. 
So when using inference RAP only supports the RDFS and OWL built in. I 
am getting at a more general question here:

RAP has done a lot of work in standards compliance and keeping pace with 
other initiatives like Jenna. But perhaps part of making RAP a most 
useful semantic web infrastructure tool would be to "integrate" with the 
output of  most popular editors. I think that RAP at its core must be an 
angel of standards compliance, so maybe these integration tools aren't 
meant to be part of RAP? But the question is, where does not supporting 
alternative namespaces leave some one like me? (A single developer 
trying to piece together a whole development/deployment environment) 
Would you tell me to switch to POWL?

Re: AW: [Rdfapi-php-interest] RE: Updating and Removing + RAP future plans

[Seaborne, A. <and...@hp...>]

Chris Bizer wrote:
> Hi Andy and all,

Hi Chris,

> 
> first, welcome as new reader on this list.
> 
> By the way, I'm currently planning how we will get Named Graphs and SPARQL
> into the next RAP release and maybe you would comment on how our plans fit
> with the DAWG and the Jena timeline.
> 
> 1. Daniel Westphal will port NG4J to PHP and starting now and hopes to be
> done mid May (including the API, TriX and a DB backend). 
> Q:Does Jena already have concrete plans on how to support Named Graphs?
> Maybe we could implement the same API.

Jena will be providing an API because it's needed for SPARQL.  ARQ has a 
updated version of MultiGraph/MultiModels in DataSet/DataSource but the graph 
and model aspects need separating.  It was put firstly to support 
experimentation of GRAPH in SPARQL and now that is settling down, it's time to 
work on the interface and see if it migrates to the main Jena package.

> 
> 2. Another Student (Ralf Jacob) will implement SPARQL protocol into our
> Joseki clone and might also implement a client library (remoteModel) and
> some access control mechanisms (graph, resource and predicate level). He
> will start 1st of June and might be done at the end of June.
> Q: Will the SPARQL protocol be stable enough by then for being implemented?

[I'm not the editor for the protocol so these are my guesses]

Good question!  Don't know but I would expect that the basic HTTP binding 
would be clear by then - parameter names may change but the style and design 
should be stable.  Maybe the same for the SOAP one - it needs more machinary 
to be defined.

> Q: Do you know of any other work on access control for RDF servers?

I don't know of any work on access control that is specific to the semantic 
web - the usual security features of your web application container still apply.

> 
> 3. Alberto wrote a SPARQL query language parser for PHP. 
> http://gargonza.asemantics.org/downloads/sparql.php
> http://demo2.asemantics.com/rdf4food/sparql.html
> I'm still looking for somebody to update this parser for the new SPARQL
> syntax and write the actual query engine. I currently have nobody for this.
> So it would be really cool if somebody from this list would volunteer.
> Q: Any guess on the timeline when the spec will be stable?

I do not expect the syntax to change much.  There is one planned revision 
which should happen soon and it is all fine-tuning now, I hope.  In 
particular, the tokens are stable and that is quite a bit of the work.

What technology does the parser use? Hand written or machine generated?

ARQ has a number of syntax test cases and these have been checked into DAWG 
CVS.  There are 60-odd test cases.  You cxan also use the rest of the ARQ test 
suite - much of it is scripted using the DAWG manifest vocabularies.

> 
> 4. There are also two people (Hannes Gassert and Tae IL Erdmann) working on
> an RDF browser implemented using RAP and Fresnel
> (http://simile.mit.edu/repository/fresnel/trunk/docs/manual/FresnelVocabular
> y.htm) which might also become part of the next RAP release. 
> Q to Hannes Gassert: Right or do you want to distribute Arago as a separate
> download?
> 
> Chris
> 

And is there an online demo?

	Andy

Re: [Rdfapi-php-interest] SPARQL in RAP

[Benjamin N. <bn...@ap...>]

On 28.04.2005 14:56:14, Chris Bizer wrote:

>Did you see the DAWG tests?
>http://www.w3.org/2001/sw/DataAccess/tests/
ah, great. I heard there were some, but didn't expect
so many already. thanx for the pointer.

>>the embedded turtle parser needs some more work, too.
>
>Is the parser an adoption of existing N3 code or a new implementation?
>Can it also be used separately from SPARQL?
it's a new implementation, integrated in the sparql parser.
It was written at an "I'm sick of parsing" stage and is currently
limited to what I thought would be neccessary for queries. *could*
be possible to separate it from the sparql stuff, though.

>I can guarantee lots of bug reports from the RAP users. Even more than =
you
>probably want ;-)
heh

>I'm also having the loose plan to look for a student who might port
>D2RQ to PHP
>(http://www.wiwiss.fu-berlin.de/suhl/bizer/d2rq/index.htm). This would be
>great because then you could query all relational databases of CMS, =
blogs,
>wikis or whatever using SPARQL. But this is more a mid-term plan ...
yeah, that'd definitely be amazing.


>I guess we won't start with SPARQL QL
>before June. See:
>http://sourceforge.net/mailarchive/message.php?msg_id=3D11593860
cool.

benjamin

--
Benjamin Nowack

Kruppstr. 100
45145 Essen, Germany
http://www.bnode.org/


>Cheers,
>
>Chris
>
>
>-- 
>Chris Bizer
>Freie Universit=E4t Berlin
>Phone: +49 30 838 54057
>Mail: ch...@bi...
>Web: www.bizer.de
>

[Rdfapi-php-interest] SPARQL in RAP

[Chris B. <bi...@ze...>]

Hi Benjamin,

>>Hannes pointed me at your SPARQL implementation yesterday.=20
>>We are currently looking for a way to get SPARQL into RAP and are
>>wondering if we could use your parser.
>yes, sure. although I'd probably suggest waiting for the next release.

Great, thanks a lot.

Next release also sounds good, because we first want to get Named Graphs
into RAP and build SPARQL on top afterwards.

>the current one has not been tested in any way other than with some
>hand-written test queries. I have already extracted a list of queries
>from the sparql WD but haven't found the time yet to test them with
>the parser.=20

Did you see the DAWG tests?
http://www.w3.org/2001/sw/DataAccess/tests/

>the embedded turtle parser needs some more work, too.

Is the parser an adoption of existing N3 code or a new implementation?
Can it also be used separately from SPARQL?

>Although including my stuff into RAP and getting some bug reports
>could be helpful to me as well.

I can guarantee lots of bug reports from the RAP users. Even more than =
you
probably want ;-)

>>Do you mind if we include your code into RAP? Would be great!
>I'd be honoured :)
>Another interesting thing could be to try porting my SPARQL-to-SQL
>rewriter to the RAP db model. I received some helping comments and
>bug reports from Richard Cyganiak, so more work is needed there, too,
>but a next version of the rewriter could perhaps be usable already.
>

Yes, this would be interesting. I'm also having the loose plan to look =
for a
student who might port D2RQ to PHP
(http://www.wiwiss.fu-berlin.de/suhl/bizer/d2rq/index.htm). This would =
be
great because then you could query all relational databases of CMS, =
blogs,
wikis or whatever using SPARQL. But this is more a mid-term plan ...

>>What are your future plans for your code? Do you plan to support all
>SPARQL
>>features or only a subset? What is the timeline of your work? =20
>ouch, timeline questions ;)
>The parser currently doesn't parse constraints. That'd be the next
>thing to do, especially as I want to use at least PrimaryExpressions
>in the rewriter (such as FILTER ?date > 2005-03). I'm aiming at being
>able to *parse* all of the SPARQL grammar features, but I'm actually
>not sure if I want to try to add support for custom filters in the
>rewriter. I'll probably focus on a subset that can be translated to
>SQL.
>Re timeline: Apart from obvious bug-fixes I'll probably not be
>able to continue working on the parser before delivering an initial
>version of the overdue semanticweb.org site. It may be that I have
>to improve the parser *for* the portal (e.g. to add support for simple
>constraints), but otherwise, I fear it won't happen before mid-may..
>

Fits perfectly with our timeline. I guess we won't start with SPARQL QL
before June. See:
http://sourceforge.net/mailarchive/message.php?msg_id=3D11593860

>
>>I'm looking forward to (hopefully) meeting you in Crete.=20
>yeah, that would be great. I'm not sure if I can afford the eswc
>this year, but I'm still hoping to at least get there for the
>scripting workshop...
>

Which would of course be even more important than the conference ;-)

Cheers,

Chris

>cheers,
>benjamin

--
Benjamin Nowack

Kruppstr. 100
45145 Essen, Germany
http://www.bnode.org/

>
>Chris
>
>
>--=20
>Chris Bizer
>Freie Universit=E4t Berlin
>Phone: +49 30 838 54057
>Mail: ch...@bi...
>Web: www.bizer.de
>

[Rdfapi-php-interest] Re: SPARQL in RAP

[Benjamin N. <bn...@ap...>]

On 28.04.2005 10:44:08, Chris Bizer wrote:
>
>Hi Benjamin,
>
>Hannes pointed me at your SPARQL implementation yesterday. 
>We are currently looking for a way to get SPARQL into RAP and are =
wondering
>if we could use your parser.
yes, sure. although I'd probably suggest waiting for the next release.
the current one has not been tested in any way other than with some
hand-written test queries. I have already extracted a list of queries
from the sparql WD but haven't found the time yet to test them with
the parser. the embedded turtle parser needs some more work, too.
Although including my stuff into RAP and getting some bug reports
could be helpful to me as well.

>Do you mind if we include your code into RAP? Would be great!
I'd be honoured :)
Another interesting thing could be to try porting my SPARQL-to-SQL
rewriter to the RAP db model. I received some helping comments and
bug reports from Richard Cyganiak, so more work is needed there, too,
but a next version of the rewriter could perhaps be usable already.

>What are your future plans for your code? Do you plan to support all =
SPARQL
>features or only a subset? What is the timeline of your work?  
ouch, timeline questions ;)
The parser currently doesn't parse constraints. That'd be the next
thing to do, especially as I want to use at least PrimaryExpressions
in the rewriter (such as FILTER ?date > 2005-03). I'm aiming at being
able to *parse* all of the SPARQL grammar features, but I'm actually
not sure if I want to try to add support for custom filters in the
rewriter. I'll probably focus on a subset that can be translated to
SQL.
Re timeline: Apart from obvious bug-fixes I'll probably not be
able to continue working on the parser before delivering an initial
version of the overdue semanticweb.org site. It may be that I have
to improve the parser *for* the portal (e.g. to add support for simple
constraints), but otherwise, I fear it won't happen before mid-may..


>I'm looking forward to (hopefully) meeting you in Crete. 
yeah, that would be great. I'm not sure if I can afford the eswc
this year, but I'm still hoping to at least get there for the
scripting workshop...

cheers,
benjamin

--
Benjamin Nowack

Kruppstr. 100
45145 Essen, Germany
http://www.bnode.org/

>
>Chris
>
>
>-- 
>Chris Bizer
>Freie Universit=E4t Berlin
>Phone: +49 30 838 54057
>Mail: ch...@bi...
>Web: www.bizer.de
>

[Rdfapi-php-interest] SPARQL in RAP

[Chris B. <bi...@ze...>]

Hi Benjamin,

Hannes pointed me at your SPARQL implementation yesterday.=20
We are currently looking for a way to get SPARQL into RAP and are =
wondering
if we could use your parser.

Do you mind if we include your code into RAP? Would be great!

What are your future plans for your code? Do you plan to support all =
SPARQL
features or only a subset? What is the timeline of your work? =20

I'm looking forward to (hopefully) meeting you in Crete.=20

Chris


--=20
Chris Bizer
Freie Universit=E4t Berlin
Phone: +49 30 838 54057
Mail: ch...@bi...
Web: www.bizer.de

-----Urspr=FCngliche Nachricht-----
Von: Chris Bizer [mailto:bi...@ze...]=20
Gesendet: Mittwoch, 27. April 2005 17:52
An: 'Hannes Gassert'; 'bn...@ap...';
'rdf...@li...'
Betreff: AW: AW: [Rdfapi-php-interest] RE: Updating and Removing + RAP
future plans


Hi Hannes,

>> 3. Alberto wrote a SPARQL query language parser for PHP.=20
>> http://gargonza.asemantics.org/downloads/sparql.php
>> http://demo2.asemantics.com/rdf4food/sparql.html
>> I'm still looking for somebody to update this parser for the new =
SPARQL
>> syntax and write the actual query engine. I currently have nobody for
>this.
>> So it would be really cool if somebody from this list would =
volunteer.
>
>http://www.bnode.org/archives1/36 comes to mind.. ;-)
>

Oh great :-) Looks like we are just looking for somebody to steal code =
from
different implementations and adapt it for RAP. Or maybe coordinate our
efforts with Benjamin ;-)=20

>> Q to Hannes Gassert: Right or do you want to distribute Arago as a
>separate download?
>
>Chris, if you want to have my stuff in RAP (once you've seen a demo of
>course.. ;-)) I'd certainly be fine with bundling it. Do you want to
>give me CVS access or shall we organize that somehow differently?
>

I would love to have a decent RDF browser in RAP and to welcome you as =
RAP
developer.=20

I guess using the RAP CVS also is the easiest option for coordinating =
you
and Tea IL. What is your sourceforge username so that I can add you as
developer?

Regards,
Chris





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AW: AW: AW: [Rdfapi-php-interest] RE: Updating and Removing + RAPfuture plans

[Chris B. <bi...@ze...>]

Hi Hannes,

>On Wed, 2005-04-27 at 17:52 +0200, Chris Bizer wrote:
>> I would love to have a decent RDF browser in RAP and to welcome you =
as
RAP developer.=20
>
>Great - hope we can meet your definition of "decent"! ;)
>
>> What is your sourceforge username so that I can add you as
>> developer?
>
>It's "gasserth".
>

I have added you as developer.

What do you think about putting your code under?

cvs / rdfapi-php / rdfapi-php / tools / arago-rdfbrowser


> PS: So you're in Berlin next week?

Yes, I'm and we should definitively have a meeting about the Arago
development together with Tae IL. On which days are you in Berlin?
Would you prefer to meet here at the University or somewhere in town =
(maybe
in a Caf=E9 at Bergmannstrasse, Kreuzberg)?

I'm having a meeting with Tae IL today and will also ask him when he has
time next week.

Chris