gmane.org.wikimedia.mediawiki.api

Re: Wikia API Help

Federico "Lox" Lucignano — 2013-06-13T09:47:30

Hi Pankaj,

yes, the list and docs of all the controllers is accessible via... an API
controller :D

Despite being far from perfect, DiscoverApi is what you're looking for; my
bad, should have linked to the index of the API controllers earlier:

http://www.wikia.com/wikia.php?controller=DiscoverApi&method=getList

you can make that request on each wiki domain to see what's available
there, on www.wikia.com there are a couple additional controllers enabled
that aren't enabled on any other wiki domain.


On Thu, Jun 13, 2013 at 11:02 AM, <pvagare< at >genius-minds.com> wrote:

Re: Wikia API Help

2013-06-13T09:02:25

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Re: Wikia API Help

Federico "Lox" Lucignano — 2013-06-12T13:43:52

Hi Pankaj,

sorry for the late reply but I had to get married in the meantime ;)

You cannot search images, as in the files themselves, but you should be
able to search the File pages by restricting the search results by
namespace ID, an example:

http://glee.wikia.com/wikia.php?controller=SearchApi&method=getList&namespaces=6&query=rachel

This request returns results for namespace 6 only, i.e. File pages
referring to "rachel", the result contains URL's to the real images.

Using the same controller (SearchApi) you can also search article content:

http://glee.wikia.com/wikia.php?controller=SearchApi&method=getList&query=Santana

You can refer to the documentation for that controller for more info:

http://glee.wikia.com/wikia.php?controller=SearchApi&method=help

Hope this answers your questions.

Cheers :)



On Thu, May 30, 2013 at 3:07 PM, <pvagare< at >genius-minds.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-06-06T21:38:29

I will treat them as distinct cases then, thank you Petr!

On Thu, Jun 6, 2013 at 11:37 PM, Luigi Assom <luigi.assom< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-06-06T21:37:52

oh thank you!! very useful indeed!

On Thu, Jun 6, 2013 at 10:55 PM, Mark Wagner <carnildo< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Mark Wagner — 2013-06-06T20:55:01

The page "AccessibleComputing"
(https://en.wikipedia.org/w/index.php?title=AccessibleComputing&redirect=no)
is a redirect to the article "Computer accessibility"
(https://en.wikipedia.org/wiki/AccessibleComputing).  The very oldest
version of the software that runs Wikipedia didn't support names with
spaces (the "AccessibleComputing" article dates from January 2001), so
there are some redirects with names like this.

The redirects "Accessible Computing"
(https://en.wikipedia.org/w/index.php?title=Accessible_Computing&redirect=no)
and "Accessible computing"
(https://en.wikipedia.org/w/index.php?title=Accessible_computing&redirect=no)
also exist, and are distinct pages with their own histories.

Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-06-06T20:20:34

Ok Petr, thank you for clarification.
I will also look for page_namespace = 14 and cl_to

P.s. one more question: on enwiki-20130503-pages-articles-multistream-index
there are some entries reporting titles with no spaces, such as:
549:10:AccessibleComputing

Why are they not reported as Accessible_Computing, making it
consistent with other dump files (e.g.
enwiki-20130503-all-titles-in-ns0) ?
Is there a special meaning for stripping the blank space?



On Thu, Jun 6, 2013 at 4:13 PM, Petr Onderka <gsvick< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Petr Onderka — 2013-06-06T14:13:13

I don't understand why the two should be different.
Futurama is a comic science fiction, so Category:Futurama is a subcategory
of Category:Comic science fiction.
World War II is a conflict that was in progress in 1939, so Category:World
War II is a subcategory of Category:Conflicts in 1939.
This seems consistent to me.



What you got was a list of parent categories of Category:World War II.
But Category:Military deception during World War II is a *subcategory* of
Category:World War II, not a parent category.

If you want to get a list of subcategories, you will need to search for
something like page_namespace = 14 AND cl_to = 'World_War_II'.

Petr Onderka
[[en:User:Svick]]
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Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-06-06T13:59:42

Hello Petr,

Thank you.

I want to obtain this result: a list of categories such as:
parent category -> subcategory


Indeed I followed this structure, selecting only category pages  and I obtained
e.g. 690070 (sub category "Futurama", cl_from)  to parent category
"Comic_science_fiction"
e.g. 690451 (sub category "World War II", cl_from)  to parent category
"Conflicts_in_1939"

so I my perception is the first example is correct, instead World War
II should be parent of Conflicts_in_1939

Am I right  or am I missing / misunderstood something?



That's correct for Modern Europe but if you compare with the page
http://en.wikipedia.org/wiki/Category:World_War_II
you see some links are missing in the sql dump, such as:
http://en.wikipedia.org/wiki/Category:Military_deception_during_World_War_II
or
http://en.wikipedia.org/wiki/Category:Sociology_of_World_War_II

This is the list I obtain: the above sub categories are not present:

6904511930s_conflicts
6904511940s_conflicts
69045120th-century_conflicts
690451Categories_requiring_diffusion
690451Conflicts_in_1939
690451Conflicts_in_1940
690451Conflicts_in_1941
690451Conflicts_in_1942
690451Conflicts_in_1943
690451Conflicts_in_1944
690451Conflicts_in_1945
690451Global_conflicts
690451Modern_Europe
690451Wars_involving_Albania
690451Wars_involving_Argentina
690451Wars_involving_Australia
690451Wars_involving_Austria
690451Wars_involving_ .... [etc.]

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Re: Reg: Extracting Wikipedia Category Hierarchy

Petr Onderka — 2013-06-06T12:52:17

That's not true. Each link in categorylinks is from a page (cl_from, this
can be a category page) to its parent category (cl_to).



That text just describes what belongs to this category. It has nothing to
do with the structure, that's always the same.



If I look at the categorylinks for that category (cl_from = 690451) in the
latest dump, I get some “conflicts” categories, then some “Wars involving
X” categories and also few others, like “Modern Europe”. I don't see any
parent category that would be missing.

Maybe it would help if you described the issue in more detail: what results
exactly are you getting, what results are you expecting and how do the two
differ.

Petr Onderka
[[en:User:Svick]]
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Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-06-06T09:18:14

Hi again guys!
I am still digging into wiki categories.
As Brad said, there is not an hierarchy.
I basically extracted categories from categorilinks.sql

I have questions about the results I obtained, which is in the form
#id_source_category title_target_category
Problem I have is that the directed graph is actually "mixed":
sometimes you have a real sub-category pointing to a parent, sometimes
viceversa so I can't understand the importance

- is there (maybe in another dump) a mark or parameter (smtg like "ns"
maybe ? ) telling you which directory is head respect to another?
As example, take "http://en.wikipedia.org/wiki/Category:World_War_II"
It is written "this is root category...."


- the other question is about results:
http://en.wikipedia.org/wiki/Category:World_War_II collects for
sub-categories which I have not found in categorilinks.sql
e.g. for WWII I otain the conflicts but not other ones.

Am I missing smthing ?





On Thu, May 30, 2013 at 7:49 PM, Pavan Kapanipathi <pavan< at >knoesis.org> wrote:

Re: upload using Javascript (and its File Api)

Brad Jorsch — 2013-06-01T23:28:45

Don't do that. Just pass the File object directly so JavaScript
encodes it as an actual file upload rather than as a very large text
field.

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upload using Javascript (and its File Api)

d_jan — 2013-06-01T17:40:39

Hello,
I try to upload files via the API using Javascript and it's File API 
(for the latter, see e.g. 
http://www.html5rocks.com/en/tutorials/file/dndfiles/)
However I have been not successful in getting it working and so were 
fellow users (see e.g. 
https://www.mediawiki.org/wiki/API_talk:Upload#REAL_WORLD_EXAMPLES_.3F.3F.3F)

Using my current approach, I always get a " One of the parameters 
filekey, file, url, statuskey is required", despite the fact that the 
file is defined.

I used jQuery, doing the following request:

formdata = new FormData();
formdata.append("action", "upload");
formdata.append("filename", fileName); //name of the file as string
formdata.append("token", myEditToken); //edit token retrieved via var 
myEditToken = mw.user.tokens.get( 'editToken' );
formdata.append("file", fileToUpload); //file read via File Api using 
readAsBinaryString(file)
        $.ajax( { 
//http://stackoverflow.com/questions/6974684/how-to-send-formdata-objects-with-ajax-requests-in-jquery
                                     url: mw.util.wikiScript( 'api' ),
                                     contentType:false,
                                     processData:false,
                                     type:'POST',
                                     data: formdata, //formdata: see 
above the $.ajax for its definition
                                     //success and error functions here, 
but deleted for the sake of brevity.
          });

Could you possible help me by telling me why the upload is not 
succeeding and do you know a (Javascript based) solution for the problem?

Kind Regards,
  Jan

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Re: Reg: Extracting Wikipedia Category Hierarchy

Pavan Kapanipathi — 2013-05-30T17:49:10

Hi Yury,
I already tried this and there are quiet a few links missing from some
categories to its parent categories. So i opted not to use dbpedia.

Thanks,
Pavan


On Thu, May 30, 2013 at 11:51 AM, Yury Katkov <katkov.juriy< at >gmail.com>wrote:

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Re: Reg: Extracting Wikipedia Category Hierarchy

Platonides — 2013-05-30T17:41:56

You only need the tables categorylinks and page [entries with
page_namespace = 14 (aka. NS_CATEGORY) ]

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Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-05-30T16:04:47

Thank you Yury,
I am looking for something like that but for all categories for analysis.
I think I will use the db of wiki.

On Thu, May 30, 2013 at 5:51 PM, Yury Katkov <katkov.juriy< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Yury Katkov — 2013-05-30T15:51:16

The simplest way is of course to use Dbpedia for that and create a
SPARQL query that will give you all the  skos:broader terms, e.g.
http://dbpedia.org/page/Category:Italian_Roman_Catholics
-----
Yury Katkov, WikiVote



On Thu, May 30, 2013 at 1:05 PM, Luigi Assom <luigi.assom< at >gmail.com> wrote:

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Re: Wikia API Help

2013-05-30T13:07:46

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Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-05-30T09:05:45

Thank you Mark,

I was indeed looking for the tables to construct that structure.
You also confirm categorylinks and categorypages are enough?


On Thu, May 30, 2013 at 10:49 AM, Luigi Assom <luigi.assom< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Luigi Assom — 2013-05-30T08:49:22

Oh I see!
(50K+ was based on a hold paper I read... 1M+ hehe wiki is growing :) )

thank you for the suggestions to the tables!

On Thu, May 30, 2013 at 1:33 AM, Petr Onderka <gsvick< at >gmail.com> wrote:

Re: Reg: Extracting Wikipedia Category Hierarchy

Mark Wagner — 2013-05-29T23:49:39

"Directed cyclic graph" is a mathematical term describing the nature of the
Wikipedia category system.  In non-mathematical terms, "graph" means it's a
collection of objects (categories) with links ("category A is a subcategory
of category B") between them, "cyclic" means that there are places where
you can go from "A" to "B" to "C" to "A" by following those links (a
category can be a subcategory of itself), and "directed" means those links
are not symmetrical (that is, if category "A" is a subcategory of "B", it
doesn't mean that "B" is a subcategory of "A").