rdfapi-php-interest Mailing List for RAP - RDF API for PHP

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Dear all, 
Is it possible to save Sparql client results as rdf file,  either in TTL or json?
Thanks 
Fathalla 

Sent from my Sony Xperia™ smartphone
Not sure I'm afraid. Perhaps someone with more l337s can answer.

On 7 December 2011 02:01, Ana Marilza Pernas <ana...@gm...> wrote:
> Hello,
>
> I'm new with the RAP API and I need to instantiate an OWL ontology using an
> application developed in PHP 4.4.0 and MySQL (I know that is obsolete... we
> will migrate but not at this moment). Thus, I'd like to know which version
> of RDF API I have to download. I've tried the last version, but it's already
> for PHP 5.
>
> Thanks,
>
> Ana.
>
>
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Hello,

I'm new with the RAP API and I need to instantiate an OWL ontology using an
application developed in PHP 4.4.0 and MySQL (I know that is obsolete... we
will migrate but not at this moment). Thus, I'd like to know which version
of RDF API I have to download. I've tried the last version, but it's
already for PHP 5.

Thanks,

Ana.

I am a student of computer engineering. I am new to semantic web. In my
project, i need to import foaf ontology and publish linked data. I am
using RAPPHP.  I am having problem in importing ontology. I desperately
need help regarding this as my project submission deadline is near. I hope you would help me in this. 

thanx in advance 		 	   		  
Great!

I'm getting results from the SPARQL API (SELECT query), but I'm not
sure how to handle errors or process the results set (currently just
an array). What should I be reading?

Cheers,
Dan (formerly living in Berlin ;-).

On 26 July 2011 10:13, Mischa Tuffield <mis...@ga...> wrote:
> Hi All,
>
> I have a patched fork of RAP in my github account
>
> http://github.com/mischat
>
> There are a number of bug fixes in the github fork, these are based on bugs we found when using RAP. I haven't gone through my fixes since putting them up on github and haven't advertised my fork publicly yet, but people should have a go at using it and report any bugs via github.
>
> Regards,
>
> Mischa
>
> Sent on the move
>
> On Jul 26, 2011, at 8:58 AM, "Chris Bizer" <ch...@bi...> wrote:
>
>> Hi Dan,
>>
>> currently, nobody from my team at Freie Universität Berlin is maintaining
>> RAP.
>>
>> Mischa Tuffield (cc'ed) from Garlik worked a while ago on RAP and also
>> wanted to prepare an updated release at some point.
>>
>> Mischa: Are you continuing this work?
>>
>> Best regards from Berlin
>>
>> Chris
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: Dan Bolser [mailto:dan...@gm...]
>> Gesendet: Samstag, 23. Juli 2011 12:09
>> An: rdf...@li...
>> Betreff: [Rdfapi-php-interest] Does this project yet live?
>>
>> I'm curious if this project is alive or dead?
>>
>> ----------------------------------------------------------------------------
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>> Rdfapi-php-interest mailing list
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>>
>

Hi Dan,

currently, nobody from my team at Freie Universität Berlin is maintaining
RAP.

Mischa Tuffield (cc'ed) from Garlik worked a while ago on RAP and also
wanted to prepare an updated release at some point.

Mischa: Are you continuing this work?

Best regards from Berlin

Chris

-----Ursprüngliche Nachricht-----
Von: Dan Bolser [mailto:dan...@gm...] 
Gesendet: Samstag, 23. Juli 2011 12:09
An: rdf...@li...
Betreff: [Rdfapi-php-interest] Does this project yet live?

I'm curious if this project is alive or dead?

----------------------------------------------------------------------------
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This modeling tool is based on patent-pending intellectual property that
has been used successfully in hundreds of IBM storage optimization engage-
ments, worldwide.  Store less, Store more with what you own, Move data to 
the right place. Try It Now!
http://www.accelacomm.com/jaw/sfnl/114/51427378/
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I'm curious if this project is alive or dead?

Hi,

I'm doing a select query against an endpoint using the tutorial here:

http://www4.wiwiss.fu-berlin.de/bizer/rdfapi/tutorial/usingtheSparqlClient.htm

However, I'd like to process the result as a RAP MemModel, for
example, as described here:

http://www4.wiwiss.fu-berlin.de/bizer/rdfapi/tutorial/usingtheModelAPI.htm#s8

Is that possible?

Cheers,
Dan.

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Hi Ciro,

thank you for your offer to support the development of RAP.

Currently, the project is in kind of sleep mode and nobody is actively
working on it from our side.

Nevertheless, we are open and happy about any external contributions.

Thus, if you use it in your project and if you extend the code base, please
send us your extensions and corrections and we will add them to the SVN.

Best regards,

Chris

-----Ursprüngliche Nachricht-----
Von: Ciro Scognamiglio [mailto:c.s...@cs...] 
Gesendet: Samstag, 7. August 2010 20:53
An: rdf...@li...
Betreff: [Rdfapi-php-interest] RAP Development and OWL

Hi all,
I hope there is somebody on this list, I have seen it is some time now the
project isn't updated, and I see on the mailing list there aren't many
messages either...anyway...
I finally had some time to spend on a personal project, part of the project
involves working with ontologies, and I was hoping to use PHP for most of
the development.
I picked up RAP because it is the only library that contains support for
ontology models (well, at least the most complete), but I am still missing
something, especially OWL support. It seems there is some code already, but
not activated, I tried activating the vocabulary and it seems there is still
some developing to do. Also I found a couple of problems:

- I use the following to include RAP in my script:

define('RDFAPI_INCLUDE_DIR', realpath('lib/rdfapi-php/api').'/');
include(RDFAPI_INCLUDE_DIR.'RDFAPI.php');

But I came across several "class not found" and "php script not found", so I
had to add by hand a require_once when I got an error like this. Am I doing
something wrong?

- This one is more serious: I am using PHP version 5.3.2, I think this
problem will affect all PHP versions starting from 5.3, maybe I can't
remember when namespaces where introduced in php, anyway, in the
RdfsVocabulary() and OWLVocabulary() classes the method NAMESPACE() can't be
used, I had to comment it (actually renamed to NS() for the moment):
Parse error: syntax error, unexpected T_NAMESPACE, expecting T_STRING in
rdfapi-php/api/ontModel/OWLVocabulary.php on line 357

I am interested in aiding the development of RAP, my own personal project
will slowly start and I could give some contribution to the code where
needed, especially on the OWL support side. Before that, I already had a
look at the sources checked out from the svn repository, but I really would
like to hear some words from the developers about the general status of the
development and the OWL support status at this time.

Thank you,
Ciro.
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Hi all,
I hope there is somebody on this list, I have seen it is some time now the project isn't updated, and I see on the mailing list there aren't many messages either...anyway...
I finally had some time to spend on a personal project, part of the project involves working with ontologies, and I was hoping to use PHP for most of the development.
I picked up RAP because it is the only library that contains support for ontology models (well, at least the most complete), but I am still missing something, especially OWL support. It seems there is some code already, but not activated, I tried activating the vocabulary and it seems there is still some developing to do. Also I found a couple of problems:

- I use the following to include RAP in my script:

define('RDFAPI_INCLUDE_DIR', realpath('lib/rdfapi-php/api').'/');
include(RDFAPI_INCLUDE_DIR.'RDFAPI.php');

But I came across several "class not found" and "php script not found", so I had to add by hand a require_once when I got an error like this. Am I doing something wrong?

- This one is more serious: I am using PHP version 5.3.2, I think this problem will affect all PHP versions starting from 5.3, maybe I can't remember when namespaces where introduced in php, anyway, in the RdfsVocabulary() and OWLVocabulary() classes the method NAMESPACE() can't be used, I had to comment it (actually renamed to NS() for the moment):
Parse error: syntax error, unexpected T_NAMESPACE, expecting T_STRING in rdfapi-php/api/ontModel/OWLVocabulary.php on line 357

I am interested in aiding the development of RAP, my own personal project will slowly start and I could give some contribution to the code where needed, especially on the OWL support side. Before that, I already had a look at the sources checked out from the svn repository, but I really would like to hear some words from the developers about the general status of the development and the OWL support status at this time.

Thank you,
Ciro.

Hey all:

      I have a question here. I'm using RAP API to develop a semantic 
wiki. I have a database storing all RDF statements obtained from the 
semantic wiki,  and this database is different from the one for wiki 
data itself. Then I use RAP API to get a dbmodel with the modelURI  of 
"http://localhost/model". I run some inference on this model. there are 
some new statements produced and of course these new statements are 
store within this dbmodel. Then I go to the wiki page, I expect to see 
these new facts shown in the 'Static Fact' bar in the wiki page, 
however, only existing facts are shown without the new facets.

     I'm wondering how new statements can reflected to wiki pages?

    I appreciate any suggestion and solution.

    Thank you very much all in advance.

     bests

     Lian

Hey all:

      I'm recently using RAP to develop a semantic wiki. I want to write 
some customized rules in order to infer more knowledge based on the 
semantic data stored in the wiki. But I have checked the API doc, little 
information relevant is found by far.

     Is any one can help me with this.

     thanks very much in advance.

    have a nice weekend.

    lian.shi

Hi all:

     I'm a started with RAP. The first question I meet is how to create 
a model from a owl file located in my local directory. I've checked the 
functions provided by ModelFactory, but I didn't find any function 
similar in Jena.

    Could someone tell me how to deal with this.

    Thanks very much.

    I'm looking forward to your solutions and suggestion.

    bests
    Lian

Hi Yves,

thanks a lot for the patch.

We are currently not actively maintain RAP. Therefore, I cc the RAP mailing
list so that the patch gets archived and can be picked up later.

Yves: If you are actively using RAP in your projects and it is likely that
you have more patches, I could also give you write access to the SVN so that
you could directly submit them. Interested?

Cheers,

Chris

-----Ursprüngliche Nachricht-----
Von: Yves Raimond [mailto:yve...@gm...] 
Gesendet: Samstag, 1. Mai 2010 12:06
An: Chris Bizer
Betreff: RAP and PHP 5.3

Hello!

Not sure if you still maintain RAP, but I found a bug which prevented it to
work correctly with PHP 5.3.

Attached is a small patch for it.

Cheers,
y

Hi Alison,

thank you very much for your bug fix.

Me and my group currently don't actively maintain RAP, which is sad, but due
to all the other projects like DBpedia, D2R Server, Silk, NG4J we are
currently involved in.

Therefore, I forward your bug fix to the RAP mailing list for archiving and
hope that it is going to be picked up once we or somebody else actively
works on another RAP release again.

Thanks again and best regards,

Chris

-----Ursprüngliche Nachricht-----
Von: Alison Callahan [mailto:ali...@gm...] 
Gesendet: Donnerstag, 11. März 2010 18:31
An: ch...@bi...
Betreff: potential fatal error fix for PHP RAP

Hello Chris,

I was working with the N3Parser for RAP, and I encountered the following set
of warnings and a fatal error when I tried to call the $parser->parse
function on a string of valid N3:

***************

Warning: array_slice() expects parameter 2 to be long, string given in
/home/alison/Programs/rdfapi-php/api/syntax/N3Parser.php on line 395

Warning: array_slice() expects parameter 2 to be long, string given in
/home/alison/Programs/rdfapi-php/api/syntax/N3Parser.php on line 395

Fatal error: Prefix not declared: : in
/home/alison/Programs/rdfapi-php/api/syntax/N3Parser.php on line 603

*****************

After looking through the code I noticed a potential error, which, when
changed, allowed the code to work. The change I made is the
following:

In N3Parser.php, the getPrefixes function calls the getSpan function but
seems to provide it with a variable of the wrong type (string instead of
long, hence the error). Namely, on line 508 of the ParseN3.php code, the
variable $pos is defined as:

$pos = current($list)

The 'current' function returns the value of an array at the internal pointer
position, but from my understanding, getSpan requires  the index of the
current array element. Thus I changed the line $pos =
current($list) to $pos = key($list) and the code seems to work perfectly. I
thought I should point this out because I don't know if this change will
have unexpected effects later on, or if this is a legitimate bug fix.

Please find attached the n3 file that I used, my simple code, and the
version of N3Parser.php with the above change at line 508.

I would appreciate knowing what you think. Thanks,

Alison Callahan
-----------------------
PhD Candidate
Department of Biology
Carleton University

Hi Pascale,

  disclaimer: I'm really a newbie with RAP.
  However, it seems that I got past the stage you're in with configuring
a SPARQL endpoint for the Semantic MediaWiki so here are my two cents...

> I red explanations but I dont understand which file to modify in part
> 3.
  As far as I understand, this step is related to using the API in your
own PHP files. I didn't need to do this. I've been following the howto
at this address:

http://semantic-mediawiki.org/wiki/Help:SPARQL_endpoint

  Then the howto they point out, here:

http://www4.wiwiss.fu-berlin.de/bizer/rdfapi/tutorial/netapi.html

Two notes on steps I found tricky in the latter:
- step 2: the /path/to/rdfapi-php/netapi/ the page is mentioning is the
virtual path of Apache, not the physical one
- step 3: I also needed to modify the netapi/config.inc.php for the API
to point to the right database.

  After doing this, I have the triples corresponding to new pages
created in the wiki stored in a RAP model and can download them in RDF
format through the rdfdb-utils page by using the RDF/XML export button.
  Unfortunately, the SPARQL endpoint itself is not working yet (that's
why I started browsing the mailing list). I'll post a message on the
issue I got very soon.

Cheers,

Cristiano

Good morning,

I would like to use the Sparql Endpoint with Semantic MediaWiki.

I have a problem about RAP software. when I upgrade tables.

I would like more requirements to install this software. I red explanations
but I dont understand which file to modify in part 3.

Download and Installation

   1. Download the current version from:
http://sourceforge.net/projects/rdfapi-php/

   2. Unpack the zip file.

   3. Include RDF API into your scripts:

          * define("RDFAPI_INCLUDE_DIR", "C:/Apache/htdocs/rdf_api/api/");

          * include(RDFAPI_INCLUDE_DIR . "RDFAPI.php");

   4. Change the constant RDFAPI_INCLUDE_DIR to the directory in which you
have unpacked the zip file.

Creation database is OK

I modified LocalSetting.php for connecting smw with RAP

Ill have to set up RAP with Netapi after.

Best regards,

----------------------------------------------------------------------------
-----

Pascale MENARD

Institut TELECOM / TELECOM Bretagne / Département Informatique

Technopôle Brest Iroise - CS 83818 - 29238 BREST Cedex 3

tel: +33 (0)2 29 00 15 29, FAX: +33 (0)2 29 00 12 82

----------------------------------------------------------------------------
---

Good morning,

I would like to use the Sparql Endpoint with Semantic MediaWiki.

I have a problem about RAP software. when I upgrade tables.

I would like more requirements to install this software. I red explanations
but I dont understand which file to modify in part 3.

Download and Installation

   1. Download the current version from:
http://sourceforge.net/projects/rdfapi-php/

   2. Unpack the zip file.

   3. Include RDF API into your scripts:

          * define("RDFAPI_INCLUDE_DIR", "C:/Apache/htdocs/rdf_api/api/");

          * include(RDFAPI_INCLUDE_DIR . "RDFAPI.php");

   4. Change the constant RDFAPI_INCLUDE_DIR to the directory in which you
have unpacked the zip file.

Creation database is OK

I modified LocalSetting.php for connecting smw with RAP

Ill have to set up RAP with Netapi after.

Best regards,

----------------------------------------------------------------------------
-----

Pascale MENARD

Institut TELECOM / TELECOM Bretagne / Département Informatique

Technopôle Brest Iroise - CS 83818 - 29238 BREST Cedex 3

tel: +33 (0)2 29 00 15 29, FAX: +33 (0)2 29 00 12 82

----------------------------------------------------------------------------
---

When I try with a very easy file:

<?php
// Include RAP
define("RDFAPI_INCLUDE_DIR",
"C:/Users/portatil/Desktop/PROYECTO/rdfapi-php/api/");
include(RDFAPI_INCLUDE_DIR . "RdfAPI.php");

// Filename of an RDF document
$base="example1.rdf";

// Create a new MemModel
$model = ModelFactory::getDefaultModel();

// Load and parse document
$model->load($base);

// Output model as HTML table
$model->writeAsHtmlTable();
?>

I receive the following output:
load($base); // Output model as HTML table $model->writeAsHtmlTable(); ?> 

And I don't understand what happen, could someone help me?

P.S. Excuse my English,please, I'm a beginner.

Hi All,
I have problem when using sparqlClient method to query dbpedia and cia
factbook datasets. Here are some error message when I used some SPARQL
Endpoint:
1. http://dbpedia.org/sparql :
unable to parse result
server returned:
Error HTTP/1.1 404 File not found
The requested URL was not found    URI  = '/sparql'

2. http://sparlq.org/sparql, there are 2 conditions:
a. if i tried to query dbpedia dataset, there is no result for it.
b. for cia factbook dataset, give this error message:
unable to parse result
server returned:
<followed by expected result>

3. http://lod.openlinksw.com/sparql
a. for dbpedia, it works well
b. for cia factbook, there was no result, except I executed my query
directly in the browser (http://lod.openlinksw.com/sparql) first, then the
expecte result could come.

Can somebody help me to solve this problem? I tried to solve my problem by
changing the sparql endpoint. However, each endpoint lead me to different
problems.

Thank you in advance for your attention.

best regards,
Hendrik

Hello,

Im new with using RAP, so I have some really basic-questions.

My first question: Is there a check when adding a property to an instance,
whether the domain and the range is "right" for the property?

A little example:

// Creating the instances
$blade_runner  = $movie->createInstance("blade_runner");
$harrison_ford = $actor->createInstance("harrison_ford");

// Creating a property
$directedBy = $ontModel->createOntProperty("directedBy");
$directedBy->addDomain($movie);
$directedBy->addRange($director);

// add the property
$blade_runner->addProperty($directedBy, $harrison_ford);

Does the RAP check that the given instance $harrison_ford is no director and
therefore may not be "connected" over $directedBy with the movie?

If no "consistency-check" exists: Why not? Would it make sense to keep the
consistency of the ontology?

Another question: How can I define the range of a property as a string, for
example to keep the name of an instance?

And my last question (for today ;-)): Is there a possibility to receive the
hierarchical structure of the classes of the ontology?

Best regards,

Timo

Hi..

I have created a form for the user to input the variable in order to query.
The code as below:

<?php
echo "
<html>
<title>
Test Query
</title>
<body>
<form name=form method=post action=simplequeryprocess.php>
<table>
<tr>
<td><h3>
Insert the Person name:
</h3>
</td>
</tr>
<tr>
<td>
<input type=text name=personname size=70 maxlength=200>
</td>
</tr>
</table>
<table>
<tr><td height=5 colspan=2></td></tr>
<tr valign=center>
<td align=right>
<input TYPE=submit NAME=search VALUE='Search' class=forButton>
<input TYPE=reset  NAME=search VALUE='  Reset  ' class=forButton>
</td>
</form>
</tr>
</table>
</body>
</html>
";
?>
The following is the process file:

<?php
echo "
<html>
<title>
Query Result
</title>
<body>
";
// Include RAP
define("RDFAPI_INCLUDE_DIR", "c:/www/rdfapi-php/api/");
include(RDFAPI_INCLUDE_DIR . "RdfAPI.php");
// Filename of an RDF document
$base="simple.rdf";
// Create a new MemModel
$model = ModelFactory::getDefaultModel();
// Load and parse document
$model->load($base);
//received data
$personname=$_POST['personname'];
$querystring = '

SELECT ?url ?PersonName ?DocumentName
WHERE
 { ?url <http://www.semanticweb.org/ontologies/2009/5/simple.owl#has-name>
?PersonName .
?url <http://www.semanticweb.org/myontology.owl#has-document-name>
?DocumentName
FILTER (?PersonName =  \"${"personname"}\")
}';
$result = $model->sparqlQuery($querystring);
SPARQLEngine::writeQueryResultAsHtmlTable($result);
echo "</body></html>";
?>

However, the \"${"personname"}\" did not carry any value and the sparql
return result as no match.
If I were to change the \"${"personname"}\" to a fix name such as "John",
sparql will return the result.

Can anyone tell me whether the way I am declaring the variable
\"${"personname"}\" is correct or wrong?.

Thanks.

Grahamakmur

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Hello,
I want to use InfModel to infer  statements. There is example on RAP 
home page, but it shows using Noation3. What about using XML RDF 
notation, is it supported?. I try to  infer this way as you see below, 
but it doesn,t work, table doesn't show inffered statements.

define ("RDFAPI_INCLUDE_DIR", "rdfapi-php/api/");
include(RDFAPI_INCLUDE_DIR . "RdfAPI.php");
$infModel= ModelFactory::getInfModelF('http://InfModelF.org');

$infModel->load("RdfExampleSchema.rdf"); //RdfExampleSchema.rdf -  rdf 
schema  describing RdfExample.rdf
$infModel->load("RdfExample.rdf");// RdfExample.rdf - rdf document
$infModel->writeAsHtmlTable(); // it prints all statements from 
RdfExampleSchema.rdf and RdfExample.rdf , but there is no inffered 
statements.

2005	Jan	Feb (16)	Mar (6)	Apr (38)	May (23)	Jun (5)	Jul (1)	Aug	Sep (10)	Oct (7)	Nov (6)	Dec (4)
2006	Jan (20)	Feb (32)	Mar (24)	Apr (29)	May (5)	Jun (10)	Jul (12)	Aug (7)	Sep (1)	Oct (2)	Nov (27)	Dec (4)
2007	Jan (37)	Feb (10)	Mar (19)	Apr (10)	May (10)	Jun (7)	Jul (19)	Aug (29)	Sep (5)	Oct (17)	Nov (14)	Dec (2)
2008	Jan (4)	Feb (4)	Mar	Apr (8)	May	Jun (8)	Jul (1)	Aug (7)	Sep	Oct (1)	Nov (4)	Dec
2009	Jan	Feb (1)	Mar	Apr (1)	May	Jun	Jul (1)	Aug	Sep	Oct	Nov (1)	Dec (2)
2010	Jan	Feb (2)	Mar (2)	Apr	May (4)	Jun	Jul	Aug (2)	Sep	Oct	Nov	Dec
2011	Jan	Feb (1)	Mar	Apr	May	Jun	Jul (4)	Aug	Sep (1)	Oct	Nov	Dec (2)
2019	Jan (1)	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

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