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Titel: Semantic Wiki Interest Group

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[swikig] Revelytix: Vocabulary Development, Collaboration & Knowledge Management in Semantic WIKI


Chronologisch Thread 
  • From: "Greg Milbank" <gregmilbank AT revelytix.com>
  • To: <swikig AT aifb.uni-karlsruhe.de>
  • Subject: [swikig] Revelytix: Vocabulary Development, Collaboration & Knowledge Management in Semantic WIKI
  • Date: Sat, 4 Aug 2007 16:42:38 -0400
  • Envelope-to: swikig AT aifb.uni-karlsruhe.de
  • List-archive: <http://www.aifb.uni-karlsruhe.de/pipermail/swikig>
  • List-id: Semantic Wiki Interest Group <swikig.aifb.uni-karlsruhe.de>

I represent a semantic technology company that has a tool to semantic enable
existing data sources (MatchIT www.revelytix.com) as well as a semantic WIKI
that supports development and management of common vocabularies (ontologies)
using the OWL/RDF standard (www.knoodl.com) . I would be please to arrange
a WebEx demonstration of these technologies at your earliest convenience.

Greg Milbank, President
Revelytix, Inc.
201-232-9195
gmilbank AT revelyti.com


-----Original Message-----
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Subject: swikig Digest, Vol 22, Issue 5

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Today's Topics:

1. Re: Paper: Reusing Ontological Background Knowledge in
SemanticWikis(comments) (Uschold, Michael F)
2. Re: Paper: Reusing Ontological Background Knowledge in
SemanticWikis (comments) (Martin Hepp (UIBK))
3. Semantics of MW Categories and OWL (Uschold, Michael F)


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

Message: 1
Date: Fri, 3 Aug 2007 13:13:57 -0700
From: "Uschold, Michael F"
<michael.f.uschold AT boeing.com>
Subject: Re: [swikig] Paper: Reusing Ontological Background Knowledge
in SemanticWikis(comments)
To:
<mhepp AT computer.org>
Cc: "Jones, David H"
<david.h.jones AT boeing.com>,
"Folger, Deborah H"

<deborah.h.folger AT boeing.com>,

mediawiki-l AT Wikimedia.org,
"Murray,
William R"
<William.R.Murray AT boeing.com>,

vrandecic AT aifb.uni-karlsruhe.de,

semediawiki-user AT lists.sourceforge.net,
Katharina Siorpaes

<katharina.siorpaes AT deri.at>,
"Blanchard, Duane L"

<Duane.L.Blanchard AT boeing.com>,

kroetzsch AT aifb.uni-karlsruhe.de,
"Kitzmiller, Ted"
<ted.kitzmiller AT boeing.com>,

swikig AT aifb.uni-karlsruhe.de
Message-ID:

<4301AFA5A72736428DA388B73676A38106674616 AT XCH-NW-6V1.nw.nos.boeing.com>

Content-Type: text/plain; charset="us-ascii"

Thanks, I will have a look at this paper.

Michael


==========================
Michael Uschold
M&CT, Phantom Works
425 373-2845
michael.f.uschold AT boeing.com

==========================

----------------------------------------------------
COOL TIP: to skip the phone menu tree and get a human on the phone, go
to: http://gethuman.com/tips.html



-----Original Message-----
From: Martin Hepp (UIBK)
[mailto:martin.hepp AT uibk.ac.at]

Sent: Friday, August 03, 2007 12:54 PM
To: Uschold, Michael F
Cc:
mhepp AT computer.org;

vrandecic AT aifb.uni-karlsruhe.de;
kroetzsch AT aifb.uni-karlsruhe.de;
Jones, David H;
semediawiki-user AT lists.sourceforge.net;
Blanchard, Duane L; Folger,
Deborah H;
mediawiki-l AT Wikimedia.org;
Kitzmiller, Ted; Murray, William
R;
swikig AT aifb.uni-karlsruhe.de;
Katharina Siorpaes
Subject: Re: [swikig] Paper: Reusing Ontological Background Knowledge in
SemanticWikis(comments)

Hi Michael:
> Does anyone know of any attempts to build build seamless integrated
> environments that do both in a virtuous cycle?
> * using wiki technology to collaboratively build ontologies > * use
ontologies and semantic technology to build better wikis Actually, one
of our underlying assumptions is that the construction of ontologies and
the usage of ontologies should not be separated, for two
reasons: First, separating the two created improper incentive structures
(people building the ontology or contributing to improving them do not
automatically improve their own access to their knowledge assets.
Second, any technical or social obstacle in the feedback loop between
ontology usage and ontology maintenance decreases the chance of having a
current, high-quality domain ontology.

I have discussed some of those problems in [1], freely available at

http://www.heppnetz.de/files/IEEE-IC-PossibleOntologies-published.pdf

Best

Martin

[1] Martin Hepp: Possible Ontologies: How Reality Constrains the
Development of Relevant Ontologies.
IEEE Internet Computing, Vol. 11, No. 1, pp. 90-96, Jan-Feb 2007.
DOI: http://doi.ieeecomputersociety.org/10.1109/MIC.2007.20



Uschold, Michael F wrote:
> Thanks for the pointer. Very interesting project.
>
> It seems that the Semantic Media Wiki project is using ontologies (&
> semantic technology) to build better wikis but are specifically NOT
> using wiki technology to build ontologies.
>
> It seems your myOntology project is using wikis to build ontologies,
but
> you are specifically NOT addressing how to use the ontologies in a
> semantic wiki environment.
>
> Does anyone know of any attempts to build build seamless integrated
> environments that do both in a virtuous cycle?
> * using wiki technology to collaboratively build ontologies
> * use ontologies and semantic technology to build better wikis
>
> Michael
>
>
>
> ==========================
> Michael Uschold
> M&CT, Phantom Works
> 425 373-2845
> michael.f.uschold AT boeing.com
>
> ==========================
>
> ----------------------------------------------------
> COOL TIP: to skip the phone menu tree and get a human on the phone, go
> to: http://gethuman.com/tips.html
>
>
>
> -----Original Message-----
> From: Martin Hepp (UIBK)
> [mailto:martin.hepp AT uibk.ac.at]
>
> Sent: Friday, August 03, 2007 12:26 AM
> To: Uschold, Michael F
> Cc:
> vrandecic AT aifb.uni-karlsruhe.de;
>
> kroetzsch AT aifb.uni-karlsruhe.de;
> Jones, David H;
> semediawiki-user AT lists.sourceforge.net;
> Blanchard,
Duane
> L; Folger, Deborah H;
> mediawiki-l AT Wikimedia.org;
> Kitzmiller, Ted;
> Murray, William R;
> swikig AT aifb.uni-karlsruhe.de;
> Katharina Siorpaes
> Subject: Re: [swikig] Paper: Reusing Ontological Background Knowledge
in
> SemanticWikis (comments)
>
> Dear Michael, all:
> What you are describing ist mostly the approach we are taking in the
> myOntology project (http://www.myontology.org). The prototype will be
> made available to the general public around Sept 1.
>
> Best
>
> Martin
>
> Uschold, Michael F wrote:
>> Denny and Markus,
>>
>> I just read your paper, "Reusing Ontological Background Knowledge in
>> Semantic Wikis".
>>
>> I have a few comments.
>>
>> You make assumptions that will hold in some usage scenarios: e.g.
>> * that the ontology is relatively fixed, so that data can be uploaded

>> etc
>> * collaborative ontology engineering may be best left to separate
>> ontology editors
>>
>> Yet there are also usage scenarios where you want everything tightly
>> integrated. Or at least I do!
>>
>> The reason is that there are high costs of keeping the ontology
>> development and evolution separate from the wiki. Things go out of
>> synch, or have to be manually kept in synch, which is expensive and
>> error-prone. This is analogous to the problem with models and
>> software requirements getting out of synch with the software.
>>
>> This is the kind of thing I want to do:
>> * start building an ontology any which way I like e.g.
>> a. in my preferred [perhaps collaborative] ontology editor
>> b. in a suitably enhanced semantic wiki editor
>>
>> * be able to import ontologies and data into the wiki,
>>
>> * be able to enter more information in the wiki using the imported
>> ontologies
>>
>> * be able to continue to edit and modify the ontology /from the wiki
>> itself/ for small changes(*)
>>
>> * be able to export the ontology and data from the wiki into my
>> favorite ontology editor for major revisions
>>
>> * be able to re-import the updated ontology, with some automated
>> assistance in keeping old versions and making new versions of the
>> pages and the semantic annotations
>>
>>
>> I may be asking for a lot, and it may not happen next month or next
>> year, but I think this vision has powerful functionality that would
be
>
>> very useful for many situations.
>>
>>
>> (*) yes i agree with you that you may want to limit the people who
can
>
>> make ontology changes.
>>
>> Thanks,
>> Michael
>>
>> ==========================
>> Michael Uschold
>> M&CT, Phantom Works
>> 425 373-2845
>> michael.f.uschold AT boeing.com
>> ==========================
>>
>>
>>
----------------------------------------------------------------------
>> --
>>
>> _______________________________________________
>> swikig mailing list
>> swikig AT aifb.uni-karlsruhe.de
>> http://www.aifb.uni-karlsruhe.de/mailman/listinfo/swikig
>



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

Message: 2
Date: Fri, 03 Aug 2007 21:53:38 +0200
From: "Martin Hepp (UIBK)"
<martin.hepp AT uibk.ac.at>
Subject: Re: [swikig] Paper: Reusing Ontological Background Knowledge
in SemanticWikis (comments)
To: "Uschold, Michael F"
<michael.f.uschold AT boeing.com>
Cc: "Jones, David H"
<david.h.jones AT boeing.com>,
"Folger, Deborah H"

<deborah.h.folger AT boeing.com>,

mediawiki-l AT Wikimedia.org,
"Murray,
William R"
<William.R.Murray AT boeing.com>,

vrandecic AT aifb.uni-karlsruhe.de,

mhepp AT computer.org,

semediawiki-user AT lists.sourceforge.net,
Katharina Siorpaes

<katharina.siorpaes AT deri.at>,
"Blanchard, Duane L"

<Duane.L.Blanchard AT boeing.com>,

kroetzsch AT aifb.uni-karlsruhe.de,
"Kitzmiller, Ted"
<ted.kitzmiller AT boeing.com>,

swikig AT aifb.uni-karlsruhe.de
Message-ID:
<46B387C2.8090504 AT uibk.ac.at>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi Michael:
> Does anyone know of any attempts to build build seamless integrated
> environments that do both in a virtuous cycle?
> * using wiki technology to collaboratively build ontologies
> * use ontologies and semantic technology to build better wikis
Actually, one of our underlying assumptions is that the construction of
ontologies and the usage of ontologies should not be separated, for two
reasons: First, separating the two created improper incentive structures
(people building the ontology or contributing to improving them do not
automatically improve their own access to their knowledge assets.
Second, any technical or social obstacle in the feedback loop between
ontology usage and ontology maintenance decreases the chance of having a
current, high-quality domain ontology.

I have discussed some of those problems in [1], freely available at

http://www.heppnetz.de/files/IEEE-IC-PossibleOntologies-published.pdf

Best

Martin

[1] Martin Hepp: Possible Ontologies: How Reality Constrains the
Development of Relevant Ontologies.
IEEE Internet Computing, Vol. 11, No. 1, pp. 90-96, Jan-Feb 2007.
DOI: http://doi.ieeecomputersociety.org/10.1109/MIC.2007.20



Uschold, Michael F wrote:
> Thanks for the pointer. Very interesting project.
>
> It seems that the Semantic Media Wiki project is using ontologies (&
> semantic technology) to build better wikis but are specifically NOT
> using wiki technology to build ontologies.
>
> It seems your myOntology project is using wikis to build ontologies, but
> you are specifically NOT addressing how to use the ontologies in a
> semantic wiki environment.
>
> Does anyone know of any attempts to build build seamless integrated
> environments that do both in a virtuous cycle?
> * using wiki technology to collaboratively build ontologies
> * use ontologies and semantic technology to build better wikis
>
> Michael
>
>
>
> ==========================
> Michael Uschold
> M&CT, Phantom Works
> 425 373-2845
> michael.f.uschold AT boeing.com
>
> ==========================
>
> ----------------------------------------------------
> COOL TIP: to skip the phone menu tree and get a human on the phone, go
> to: http://gethuman.com/tips.html
>
>
>
> -----Original Message-----
> From: Martin Hepp (UIBK)
> [mailto:martin.hepp AT uibk.ac.at]
>
> Sent: Friday, August 03, 2007 12:26 AM
> To: Uschold, Michael F
> Cc:
> vrandecic AT aifb.uni-karlsruhe.de;
>
> kroetzsch AT aifb.uni-karlsruhe.de;
> Jones, David H;
> semediawiki-user AT lists.sourceforge.net;
> Blanchard, Duane
> L; Folger, Deborah H;
> mediawiki-l AT Wikimedia.org;
> Kitzmiller, Ted;
> Murray, William R;
> swikig AT aifb.uni-karlsruhe.de;
> Katharina Siorpaes
> Subject: Re: [swikig] Paper: Reusing Ontological Background Knowledge in
> SemanticWikis (comments)
>
> Dear Michael, all:
> What you are describing ist mostly the approach we are taking in the
> myOntology project (http://www.myontology.org). The prototype will be
> made available to the general public around Sept 1.
>
> Best
>
> Martin
>
> Uschold, Michael F wrote:
>> Denny and Markus,
>>
>> I just read your paper, "Reusing Ontological Background Knowledge in
>> Semantic Wikis".
>>
>> I have a few comments.
>>
>> You make assumptions that will hold in some usage scenarios: e.g.
>> * that the ontology is relatively fixed, so that data can be uploaded
>> etc
>> * collaborative ontology engineering may be best left to separate
>> ontology editors
>>
>> Yet there are also usage scenarios where you want everything tightly
>> integrated. Or at least I do!
>>
>> The reason is that there are high costs of keeping the ontology
>> development and evolution separate from the wiki. Things go out of
>> synch, or have to be manually kept in synch, which is expensive and
>> error-prone. This is analogous to the problem with models and
>> software requirements getting out of synch with the software.
>>
>> This is the kind of thing I want to do:
>> * start building an ontology any which way I like e.g.
>> a. in my preferred [perhaps collaborative] ontology editor
>> b. in a suitably enhanced semantic wiki editor
>>
>> * be able to import ontologies and data into the wiki,
>>
>> * be able to enter more information in the wiki using the imported
>> ontologies
>>
>> * be able to continue to edit and modify the ontology /from the wiki
>> itself/ for small changes(*)
>>
>> * be able to export the ontology and data from the wiki into my
>> favorite ontology editor for major revisions
>>
>> * be able to re-import the updated ontology, with some automated
>> assistance in keeping old versions and making new versions of the
>> pages and the semantic annotations
>>
>>
>> I may be asking for a lot, and it may not happen next month or next
>> year, but I think this vision has powerful functionality that would be
>
>> very useful for many situations.
>>
>>
>> (*) yes i agree with you that you may want to limit the people who can
>
>> make ontology changes.
>>
>> Thanks,
>> Michael
>>
>> ==========================
>> Michael Uschold
>> M&CT, Phantom Works
>> 425 373-2845
>> michael.f.uschold AT boeing.com
>> ==========================
>>
>>
>> ----------------------------------------------------------------------
>> --
>>
>> _______________________________________________
>> swikig mailing list
>> swikig AT aifb.uni-karlsruhe.de
>> http://www.aifb.uni-karlsruhe.de/mailman/listinfo/swikig
>



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

Message: 3
Date: Fri, 3 Aug 2007 18:12:45 -0700
From: "Uschold, Michael F"
<michael.f.uschold AT boeing.com>
Subject: [swikig] Semantics of MW Categories and OWL
To:
<mediawiki-l AT Wikimedia.org>,

<semediawiki-user AT lists.sourceforge.net>,

<swikig AT aifb.uni-karlsruhe.de>
Cc: "Clark, Peter E"
<clarkp AT thumper.rt.cs.boeing.com>,
"Kitzmiller,
Ted"
<ted.kitzmiller AT boeing.com>,
"Jones, David H"

<david.h.jones AT boeing.com>,
"Folger, Deborah H"

<deborah.h.folger AT boeing.com>,
"Murray, William R"

<William.R.Murray AT boeing.com>
Message-ID:

<4301AFA5A72736428DA388B73676A38106674621 AT XCH-NW-6V1.nw.nos.boeing.com>

Content-Type: text/plain; charset="us-ascii"

SUMMARY:

The semantics of categories in Media Wiki seems to be too general, so
that it is not amenable to linking up with OWL.

For example, by conflating subclass and instance with one relation,
'Category', I cannot capture the fact that say Person is an instance of
OWLClass, and also a subclass of OWLThing.

One specific problem arises when I create a Template for say Project.

I want every project created to be in Category Project, so I include
"[[Category:Project]]" in the wiki page: "Template:Project".
This gives the desired result that each wiki page using the template is
in the project category.

However, it ALSO puts the template itself in the Project Category. This
is fine if the semantics is: "is related to in some way". But I want the
semantics of OWL: is a member of the classs. I don't know how to do this
in SMW.

Another problem is that if I use another template on the same page (say
Manager), then the page will be in both categories: Project and Manager.

Again, this is fine with the semantics being "is related to in some
way". But it gives the wrong answer if I want to interpret this as
member/instance of a class. A page that happed to use a macro that was
about a certain topic is what I get. I want to clearly say that a wiki
page is an instance of a class and not the broader meaning of "is
related to in some way".

So the basic question is: how can I get the Semantic Media Wiki to
distinguish different meanings of 'Catagory' that OWL supports and that
I need given they seem to be all conflated in SMW.

I fear I will be doing a variety of workarounds.
If anyone has any thoughts on this, I'd be grateful.

DETAILS:

Here is my current understanding of a MW Category:
* Fundamentally, it seems to be a tag to associate with one or more wiki
pages, much like a FlickR tag (e.g. Person, Africa)
* A Category can have sub-Categories (e.g. AirlinePilot for Person and
South-Africa for Africa)
* A page that is associated with a sub-Category is also associated with
all super-Categories (hierarchical inference of a sort)
* When a Category page is shown, you get to see all the pages in that
category for free

That seems to be about it. With such a weak semantics for Category, it
can be used to represent many different things:

* subclass e.g. AirlinePilot is a subclass of Person
* instance e.g. Africa is an instance of a Country
e.g. Joe is an instance of a SouthAfricaPerson
* subregion e.g. SouthAfrica is a subregion of Africa
* topic: e.g. SouthAfricaBook is a book on the topic of SouthAfrica

As it is, this can give rise to undesirable inferences.
In OWL, we need to make clear distinctions between these kinds of
relationships.


EXAMPLE

Suppose we have a category hierarchy as follows.
Person
AirlinePilot
AfricanPerson
SouthAfricanPerson

Africa
SouthAfrica
SouthAfricanPerson
SouthAfricaBook

Country
SouthAfrica

PhysicalObject
Book
SouthAfricaBook

Suppose we have the following wiki pages:

Wiki Page Description Category
Joe A person living in South Africa SouthAfricanPerson
Apartheid A book about South Africa SouthAfricaBook

MediaWiki will infer:
That JOE: is in the following categories:
* SouthAfrica, Africa, Country, Person

That APARTHEID is in the following categories:
Book, PhysicalObject, SouthAfrica, Africa, Country

Are these desirable inferences?

Q: What is the relationship between the book Apartheid and the category
Country?
A: It is a book about a place that happens to be in a particular
country.

Well, virtually all places are in some country, so such inferences will
often be irrelevant and unwanted.

IHMO, the root of the problem is that the semantics of Category is very
weak - it can be used to represent any arbitrary association*

Michael

* I do recognize a tradeoff here: a weak semantics makes it easier for
the masses to do enter information.


==========================
Michael Uschold
M&CT, Phantom Works
425 373-2845
michael.f.uschold AT boeing.com

==========================

----------------------------------------------------
COOL TIP: to skip the phone menu tree and get a human on the phone, go
to: http://gethuman.com/tips.html



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  • [swikig] Revelytix: Vocabulary Development, Collaboration & Knowledge Management in Semantic WIKI, Greg Milbank, 04.08.2007

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