Re: [Rdfapi-php-interest] N3 parser bugfix: lone semicolons

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

Fix is in CVS.


On 26 Feb 2006, at 22:01, Richard Cyganiak wrote:

> Hi,
>
> The N3 parser has a bug that causes broken triples in cases like this:
>
>    <foo>
>       :bar "bar";
>       :baz "baz";
>       .
>
> The last statement (<foo> :baz "baz") is terminated by a semicolon  
> *and* a dot. This is legal in N3, and in fact quite common because  
> that way you can't mix up the end-of-line punctuation.
>
> RAP's parser doesn't recognize this, sees a third triple with a  
> null predicate and object, and generates two notices.
>
> Here's a test case for /test/unit/Syntax/n3Parser_test.php that  
> catches the bug:
>
>         function testLoneSemicolon() {
>             $n3 = '<a> <b> <c> ; .';
>             $parser = &new N3Parser();
>             $model = &$parser->parse2model($n3, false);
>             $this->assertEqual(1, $model->size());
>             $this->assertNoErrors();
>         }
>
> Here's the fix for /api/syntax/N3Parser.php . I've added two lines  
> to the getPovs method, it's the comment line and the one after.
>
>   function getPovs($list) {
>     $povs = array();
>     while (in_array(';', $list)) {
>       $r=$this->posns($list,';');
>       $pos=array_slice($r,0,2);
>       $r = $this->getSpan($list, $pos[0], $pos[1]);
>       $pov=$r[0];
>       $list=$r[1];
>
>       // skip lone semicolons, e.g. "<a> <b> <c> ; ."
>       if (count($pov) == 1) continue;
>
>       $povs[]=array_slice($pov,1);
>     }
>
> Best,
> Richard
>
>
> -------------------------------------------------------
> This SF.Net email is sponsored by xPML, a groundbreaking scripting  
> language
> that extends applications into web and mobile media. Attend the  
> live webcast
> and join the prime developer group breaking into this new coding  
> territory!
> http://sel.as-us.falkag.net/sel? 
> cmd=lnk&kid=110944&bid=241720&dat=121642
> _______________________________________________
> Rdfapi-php-interest mailing list
> Rdf...@li...
> https://lists.sourceforge.net/lists/listinfo/rdfapi-php-interest
>