Hi,
I don't think that its a problem, because you can annotate
Redirection-Pages too. This makes sense, because in the Wikipedia, not
all information is stored atomically. Instead, Redirects are often
redirecting to subsections of bigger articles. It is also possible to
categorize or translate Redirection-Pages, so why not semantically
annotate them? I think this makes sense.
If there would not be this possible, the Articles in the Wikipedia
would need to get rewritten so the information becomes more atomic.
ys, MovGP0
On Nov 19, 2007 1:05 AM, Audra Johnson <[EMAIL PROTECTED]> wrote:
> A few weeks ago, I discovered that searches with a few subqueries
> were dreadfully slow and found the cause to be making annotated
> redirects equivalent to their targets. I suggested making redirect
> equivalency a SMW option--but when I went scanning for how to
> implement it, I gleefully found that it was already included! The
> setting is:
>
> $smwgQEqualitySupport = true; // Should #redirects be evaluated as
> equality between page names?
>
> (It should probably include a note about efficiency for its comment,
> just like the one for $smwgQDefaultNamespaces--taking out redirect
> equality support can make a HUGE difference for more complex
> queries. HUGE being the difference between a three subquery search
> taking 34 minutes with redirect equivalency and .3 seconds without.)
>
> In any case, my semantic wiki has been happily humming and searching
> along since I set $smwgQEqualitySupport to false. But I also need
> a way to tell where annotations in the wiki are pointing to
> redirected pages, so they can be fixed.
>
> So I've made a special page for redirected annotations that extends
> SMWQueryPage. This will make it easy for people to find where
> annotations are pointing to redirected pages and fix them to point at
> the right ones.
>
> Messages that would are added for this page:
>
> // Messages for Redirected Annotations Special
> 'redirectedannotations' => 'Redirected annotations',
> 'smw_redirectedannotations_docu' => 'The object of these annotations
> points to a redirected page.',
> 'smw_redirectedannotations_template' => 'On page $1, the annotation
> $2::$3 redirects to $4.',
>
> It required one additional function to SMW_SQLStore in the "Special
> page functions" section:
>
> function getRedirectedAnnotationsSpecial($requestoptions = NULL) {
> wfProfileIn("SMWSQLStore::getRedirectedAnnotationsSpecial
> (SMW)");
> $db =& wfGetDB( DB_SLAVE );
> $options = ' ORDER BY subject_title';
>
> if ($requestoptions->limit > 0) {
> $options .= ' LIMIT ' . $requestoptions->limit;
> }
> if ($requestoptions->offset > 0) {
> $options .= ' OFFSET ' . $requestoptions->offset;
> }
>
> extract( $db->tableNames('smw_relations', 'redirect') );
>
> $res = $db->query("SELECT subject_title, subject_namespace,
> relation_title, object_title, object_namespace, rd_title,
> rd_namespace FROM $smw_relations "
> . "INNER JOIN $redirect ON $smw_relations.object_id =
> $redirect.rd_from"
> . $options, 'SMW::getRedirectedAnnotationsSpecial');
> $result = array();
>
> while($row = $db->fetchObject($res)) {
> $subject_page =
> Title::newFromText($row->subject_title, $row-
> >subject_namespace);
> $relation_page =
> Title::newFromText($row->relation_title,
> SMW_NS_PROPERTY);
> $object_page = Title::newFromText($row->object_title,
> $row-
> >object_namespace);
> $rd_page = Title::newFromText($row->rd_title,
> $row->rd_namespace);
> $result[] = array($subject_page, $relation_page,
> $object_page,
> $rd_page);
> }
>
> wfProfileOut("SMWSQLStore::getRedirectedAnnotationsSpecial
> (SMW)");
> return $result;
> }
>
> And it needs to be added in the enableSemantics() function in
> SMW_GlobalFunctions.php:
>
> $wgSpecialPages['RedirectedAnnotations'] = array
> ('SMWSpecialPage','RedirectedAnnotations',
> 'smwfDoSpecialRedirectedAnnotations', $smwgIP . '/specials/QueryPages/
> SMW_SpecialRedirectedAnnotations.php');
>
> I've attached the PHP code for the page itself.
>
> Am looking for input on:
>
> * Whether the special page should be initialized and included only if
> $smwgQEqualitySupport = false
> * Whether the page name RedirectedAnnotations is an adequate name
> * Other wording that should be changed or tweaked. For example, in
> the smw_redirctedannotations_temp:
> * Message text: "the annotation Similar to::X redirects to Y." or
> "the relation Similar to::X redirects to Y.", since this only happens
> to relation annotations? "The object of these annotations points to a
> redirected page." or "The object of these relations points to a
> redirected page." ?
> * Coding style
>
>
>
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