5 Nov
2010
5 Nov
'10
2:37 a.m.
Apology for cross posting.
Can someone point me to where in the XWiki code I could implement an
extended XWiki link syntax? E.g. if I'd like to handle something like
this:
Berlin is a city in [[locatedIn::Germany>>Germany]]
where I'm adding the double-colon syntax before the usual link info.
--
Mark Wallace
Principal Engineer, Semantic Applications
Modus Operandi, Melbourne, FL, USA
5 Nov
5 Nov
10:13 a.m.
Hi Mark,
On Nov 5, 2010, at 2:37 AM, mwallace(a)modusoperandi.com wrote:
This is so cool that you have this need since we've just implemented extensibility for
this in XE 2.5+:
http://jira.xwiki.org/jira/browse/XWIKI-5486
The doc is now available at:
http://code.xwiki.org/xwiki/bin/view/Modules/RenderingModule#HAddinganewLin…
Thanks
-Vincent
3:58 p.m.
I guess my question on the matter is, Does Xwiki support fully the wikimodel?
(found here: http://code.google.com/p/wikimodel/ )
Because I get impression that Xwiki as a whole is close to an inline (in
text) semantic annotation which can then be grabbed and stored via RDF/OWL,
I have not just seen it implemented or documented much of anywhere.
I was reading up on Nepomuk and they seemed to have implemented something
that is similar to this. If the syntax is not supported, is there a way to
link the typing of links as noted above to the concept of a triple, or other
such semantic link.
I understand the use of objects can be used to add a similar idea of
structured knowledgeable information to a page, is there a way that these
can be meshed? is there a way to syntactically create "knowledgeable"
information currently supported in the page itself? I feel from what I have
seen that the framework is there, if its not fully implemented, I think that
this is something that could further the idea if a wiki 2.0 (reasonable,
searchable, smart, structured information.)
--
View this message in context:
http://xwiki.475771.n2.nabble.com/where-to-extend-XWiki-link-syntax-tp57076…
Sent from the XWiki- Dev mailing list archive at Nabble.com.
6:07 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
Cool. I looked at the links you gave.
My goal is to have a possibly wide range of semantic property names for
the the links (i.e. a semantic wiki [2]). So if I wanted to use the
2.5+ capabilities you mentioned, then perhaps I could use parameters to
get my semantic info in there? [1] says 'XWiki Syntax 2.1 only supports
"queryString" and "anchor".' How could I extend this (where in
code to
get started)?
A different example of what I'm trying to do, using a syntax flavor
closer to the XWiki 2.1 syntax, might be:
Berlin is located in
[[Germany>>doc:Main.Germany||property="locatedIn"]]
I.e. I want to mark-up the link as to what its meaning is... that it
represents a located-in relationship. (Same goals as the Semantic
Web.) Perhaps there is already a feature like this in xwiki that I
don't know about. If not, where would I get started in the code to
extend it to do this?
Thanks,
-Mark
References:
[1]
http://nexus.xwiki.org/nexus/service/local/repositories/releases/archive/or…
[2] http://code.google.com/p/wikimodel/
On 11/5/2010 5:13 AM, Vincent Massol wrote:
6:15 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
Hi Mark,
On Nov 5, 2010, at 6:07 PM, Mark Wallace wrote:
Yes parameters is a good way to add any additional information. You don't need to
extend it. You can just use it. Then you need to do something with it. Macros and
Transformations can then access this information.
Re semantic syntax, see http://jira.xwiki.org/jira/browse/XWIKI-3320
This is a link. If you don't need a link you should instead write:
Berlin is located in (% property="locatedIn" %)Germany(%%)
or
Berlin is located in (% property="locatedIn"
%)[[Germany>>Main.Germany]](%%)
Note: This is going to generate a FormatBlock in XDOM, which you can access with
Transformation and Macros.
Hope it helps,
-Vincent
10 Nov
10 Nov
3:24 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
On 11/5/2010 1:15 PM, Vincent Massol wrote:
This is something I do from Java? Can you point me to
where to get
started? I've spent a good bit of time with the source code and
xwiki.org documentation, but have not yet been able to determine where
to get started. :-(
-Mark
Hope it helps,
-Vincent
3:42 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
Hi Mark,
On Nov 10, 2010, at 3:24 PM, Mark Wallace wrote:
There are several places where you can interact with the document's DOM (we call it
the XDOM):
- in Rendering Transformations
- in scripts written in pages since you can get the XDOM using doc.getXDOM() and thus get
this information to perform whatever you want
- in Renderers. For example you might want to generate something visual or an auto link.
If you want more help you need to tell us what you want to do with this information.
Regarding the Rendering system, it's documented here:
http://code.xwiki.org/xwiki/bin/view/Modules/RenderingModule
Thanks
-Vincent
4:16 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
On 11/10/2010 9:42 AM, Vincent Massol wrote:
Vincent, thanks so much for your help and patience.
What I want to do is have the semantic functionality described at the
bottom of this google code "wikimodel" homepage [1] which is:
"Semantic Web compatibility"
One of the most important issues is to be compatible with the main
standard/datamodel of Semantic Web -- with Resource Description
Framework (RDF). It means that both models (WEM as well as WOM)
offer the possibility to map elements from wiki pages to
RDF-statements. So each wiki page can be considered as a node in an
RDF-graph. It allows to transform wiki-tools into powerful yet
simple Semantic Web applications.
Or if you are familiar with Semantic Mediawiki (SMW) [2], I am looking
to get its basic functionality. (I have used SMW extensively, but now
want to consider XWiki because it is Java based and I hope it will be
easier to extend in various ways.)
That functionality is:
1) Treat pages as nodes in an RDF graph. This includes the ability to
categorize pages (make them a member of an owl:Class)
2) Treat links between pages as owl:ObjectProperties.
3) Treat certain values on pages as owl:DatatypeProperties
4) Dynamically query wiki model based on these classes and properties.
For example, say I have a page on Berlin and a page on Germany. The
Berlin page looks like this in standard XWiki markup:
Berlin is located in [[Germany>>doc:Main.Germany]] and has a population of
3,400,000.
So we know there is a link between Berlin and Germany, but we don't know
what the link means. We also don't know what kind of "object" Berlin is.
For my RDF-ish model of information, I'd like to add a bit more markup
to the page to clarify this, e.g.
Berlin is located in
[[Germany>>doc:Main.Germany||property="locatedIn"]] and has a population
of (% property="population" %)3,400,000(%%).
[[Category:City]]
Note how I've given a type to the link between Germany and Berlin (it is
a locatedIn property), some structure to the formerly plain text value
3,400,000 (it is now a named property of Berlin), and finally, with the
[[Category:City]] markup (or something like it) I have stated the kind
of "object" Berlin is; it is a city.
When this page is saved, I want the database to know the following:
Berlin hastype City
Berlin locatedIn Germany
Berlin population 3,400,000
I want the database/datamodel to know this so I can:
1) query this kind of information from other pages for dynamic table
building
2) render this information as RDF through a SPARQL endpoint.
I hope this clarifies my intent. In summary, I want to intercept page
markup on page edits and maintain an RDF-ish model of the knowledge in
the wiki.
Thanks for any help you can provide.
-Mark
References
[1] http://code.google.com/p/wikimodel/
[2] http://semantic-mediawiki.org/wiki/Introduction_to_SMW
6:35 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
On 11/10/2010 04:16 PM, Mark Wallace wrote:
Hi Mark,
Here's a sketch of what you could do:
1. The metadata store should be implemented outside the standard XWiki
store, using a database suited for storing RDF and that knows SPARQL; it
should provide nice APIs to store and retrieve information from it
2. Write a component implementing EventListener and which listens to
document events (DocumentSaveEvent, DocumentUpdateEvent,
DocumentDeleteEvent)
3. This component gets the XDOM of the affected document and looks at
each [[link]] and each (%parameter block%) to see what metadata it can
extract, and stores it (update, delete) into the semantic database
Normally this should already work without any other changes to the
platform, using the syntax you just provided. The problem is that these
properties will end up in the generated HTML, so they create invalid
markup (unknown attributes), but also invalid links, since
[[Category:City]] will try to link to Category:Main.City, that is a
"City" document in the "Main" space of the "Category"
virtual wiki. So,
you can also do:
4. Extend the XHTML Renderer to ignore the property attribute
5a. You can either override DocumentXHTMLLinkTypeRenderer to ignore
links apparently coming from the "Category" wiki, or
5b. Add a new link type and a custom renderer for it, which will make it
easier and more generic to find semantic links
I can't help more with technical details since I'm not that familiar
with the rendering engine.
--
Sergiu Dumitriu
http://purl.org/net/sergiu/
11 Nov
11 Nov
12:18 a.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
Mark Wallace wrote:
Thanks very much. I think this is the pointer I
needed!
-Mark
I would like to add this reference to this discussion:
Sergiu Dumitriu and Marta Gîrdea and Sabin Buraga, 2007. Knowledge
Management in a Wiki Platform via Microformats
http://www.aaai.org/Papers/FLAIRS/2007/Flairs07-058.pdf
Thanks!
--
Ricardo Rodríguez
CTO
eBioTIC.
Life Sciences, Data Modeling and Information Management Systems
10 Nov
10 Nov
7:52 p.m.
New subject: [xwiki-devs] [xwiki-users] where to extend XWiki link syntax?
On Nov 10, 2010, at 4:16 PM, Mark Wallace wrote:
Right now what is stored in the database on the XWiki side is the document's content
in plain text. Thus in order to access it as an XDOM you need to get the document and ask
for its XDOM.
For example in groovy this is done like this:
{{groovy}}
def xdom = doc.document.getXDOM()
/* Algo:
- look for LinkBlock
- get the property
etc
{{/groovy}}
However you won't be able to query the whole wiki for this information since it
isn't stored in the DB.
If you wanted to do that you'd need to write an EventListener and catch the document
save event and when your listener is called navigate the XDOM to extract the information
you want from it and store it in your own tables in the DB (for example - you could also
save it anywhere else you wish: lucene, another external storage, etc).
2) render this information as RDF through a SPARQL
endpoint.
You'd need to implement your own Renderer for this (or extend our XHTML Renderer).
Note that if all you want is to generate special XHTML based only on the content of the
current doc you don't need step 1) above.
Thanks
-Vincent
5255
days inactive
5261
days old
12 comments
7 participants
participants (7)
-
[Ricardo Rodriguez] eBioTIC. -
Ecaterina Moraru (Valica) -
Mark Wallace -
mbryant -
mwallace＠modusoperandi.com
-
Sergiu Dumitriu -
Vincent Massol