Archive for the ‘W3C’ Category

Open Data On The Web : April 2013

Thursday, April 25th, 2013

Open Data On The Web : April 2013 by Kal Ahmed.

From the post:

I was privileged to be one of the attendees of the Open Data on the Web workshop organized by W3C and hosted by Google in London this week. I say privileged because the gathering brought together researchers, developers and entrepreneurs from all around the world together in a unique mix that I’m sure won’t be achieved again until Phil Archer at W3C organizes the next one.

In the following I have not used direct quotes from those named as I didn’t make many notes of direct quotations. I hope that I have not misrepresented anyone, but if I have, please let me know and I will fix the text. This is not a journalistic report, its more a reflection of my concerns through the prism of a lot of people way smarter than me saying a lot of interesting things.

Covers sustainability, make it simpler?, data as a service, discoverability, attribution & licensing.

Kal has an engaging writing style and you will gain a lot just from his summary.

The issues he reports are largely the same across the datasphere, whatever your technological preference.

Posted in Open Data, W3C | No Comments »

Open Annotation Data Model

Tuesday, March 19th, 2013

Open Annotation Data Model

Abstract:

The Open Annotation Core Data Model specifies an interoperable framework for creating associations between related resources, annotations, using a methodology that conforms to the Architecture of the World Wide Web. Open Annotations can easily be shared between platforms, with sufficient richness of expression to satisfy complex requirements while remaining simple enough to also allow for the most common use cases, such as attaching a piece of text to a single web resource.

An Annotation is considered to be a set of connected resources, typically including a body and target, where the body is somehow about the target. The full model supports additional functionality, enabling semantic annotations, embedding content, selecting segments of resources, choosing the appropriate representation of a resource and providing styling hints for consuming clients.

My first encounter with this proposal so I need to compare it to my Simple Web Semantics.

At first blush, the Open Annotation Core Model looks a lot heavier than Simple Web Semantics.

I need to reform my blog posts into a formal document and perhaps attach a comparison as an annex.

Posted in Annotation, RDF, Semantic Web, W3C | No Comments »

Linked Data Platform 1.0 (W3C)

Thursday, March 7th, 2013

Linked Data Platform 1.0 (W3C)

Abstract:

A set of best practices and simple approach for a read-write Linked Data architecture, based on HTTP access to web resources that describe their state using the RDF data model.

Just in case you every encounter such a platform.

Posted in Linked Data, W3C | No Comments »

URL Homonym Problem: A Topic Map Solution

Wednesday, February 27th, 2013

You may have heard about the URL homonym problem.

The term “URL” is spelled and pronounced the same way but can mean:

URL as defined by Uniform Resource Identifier (URI): Generic Syntax, RFC 3986, or

URL as defined by HTML5 (Draft, December 17, 2012)

To refresh your memory:

URL in RFC 3986 is defined as:

The term “Uniform Resource Locator” (URL) refers to the subset of URIs that, in addition to identifying a resource, provide a means of locating the resource by describing its primary access mechanism (e.g., its network “location”).

A URL in RFC 3986 is a subtype of URI.

URL in HTML5 is defined as:

A URL is a string used to identify a resource.

A URL in HTML5 is a supertype of URI and IRI.

I would say that going from being a subtype of URI to being a supertype of URI + IRI is a “…willful violation of RFC 3986….”

In LTM syntax, I would solve the URL homonym problem as follows:

#VERSION "1.3"

/* association types */

[supertype-subtype = "Supertype-subtype";
@"http://psi.topicmaps.org/iso13250/model/supertype-subtype"]

[supertype = "Supertype";
@"http://psi.topicmaps.org/iso13250/model/supertype"]

[subtype = "Subtype";
@"http://psi.topicmaps.org/iso13250/model/subtype"]

/* topics */

[uri = "URI";
@"http://tools.ietf.org/html/rfc3986#1.1"]

[url-rfc3986 = "URL";;"URL-RFC 3986"
@"http://tools.ietf.org/html/rfc3986#1.1.3"]

supertype-subtype(uri : supertype,url-rfc3986 : subtype)

[url-html5 = "URL";;"URL-HTML5"
@"http://www.w3.org/TR/2012/CR-html5-20121217/infrastructure.html#urls"]

supertype-subtype(url-html5 : supertype,uri : subtype)

A solution to the URL homonym problem only in the sense of distinguishing which definition is in use.

Posted in HTML5, Homonymous, W3C | 2 Comments »

W3C Community and Business Groups

Thursday, November 22nd, 2012

W3C Community and Business Groups

A listing of current Community and Business Groups at the W3C. W3C membership is not required to join but you do need a free W3C account.

Several are relevant to semantics and semantic integration and are avenues for meeting other people interested in those topics.

Posted in Semantics, W3C | No Comments »

HTML Data Task Force

Sunday, October 2nd, 2011

HTML Data Task Force, chaired by Jeni Tennison.

Another opportunity to participate in important work at the W3C without a membership. The “details” of getting diverse formats to work together.

Close analysis may show the need for changes to syntaxes, etc., but as far as mapping goes, topic maps can take syntaxes as they are. Could be an opportunity to demonstrate working solutions for actual use cases.

From the wikipage:

This HTML Data Task Force considers RDFa 1.1 and microdata as separate syntaxes, and conducts a technical analysis on the relationship between the two formats. The analysis discusses specific use cases and provide guidance on what format is best suited for what use cases. It further addresses the question how different formats can be used within the same document when required and how data expressed in the different formats can be combined by consumers.

The task force MAY propose modifications in the form of bug reports and change proposals on the microdata and/or RDFa specifications, to help users to easily transition between the two syntaxes or use them together. As with all such comments, the ultimate decisions on implementing these will rest with the respective Working Groups.

Further, the Task Force should also produce a draft specifications of mapping algorithms from an HTML+microdata content to RDF, as well as a mapping of RDFa to microdata’s JSON format. These MAY serve as input documents to possible future recommendation track works. These mappings should be, if possible, generic, i.e., they should not be dependent on any particular vocabulary. A goal for these mappings should be to facilitate the use of both formats with the same vocabularies without creating incompatibilities.

The Task Force will also consider design patterns for vocabularies, and provide guidance on how vocabularies should be shaped to be usable with both microdata and RDFa and potentially with microformats. These patterns MAY lead to change proposals of existing (RDF) vocabularies, and MAY result in general guidelines for the design of vocabularies for structured data on the web, building on existing community work in this area.

The Task Force liaises with the SWIG Web Schemas Task Force to ensure that lessons from real-world experience are incorporated into the Task Force recommendations and that any best practices described by the Task Force are synchronised with real-world practice.

The Task Force conducts its work through the public-html-data-tf@w3.org mailing list (use this link to subscribe or look at the public archives), as well as on the #html-data-tf channel of the (public) W3C IRC server.

Posted in HTML, Microdata, RDFa, W3C | No Comments »

Web Schemas Task Force

Saturday, October 1st, 2011

Web Schemas Task Force, chaired by R.V. Guha (Google).

Here is your opportunity to participate in some very important work at the W3C without a W3C membership.

From the wiki page:

This is the main Wiki page for W3C’s Semantic Web Interest Group Web Schemas task force.

The taskforce chair is R.V.Guha (Google).

In scope include collaborations on mappings, tools, extensibility and cross-syntax interoperability. An HTML Data group is nearby; detailed discussion about Web data syntax belongs there.

See the charter for more details.

The group uses the public-vocabs@w3.org mailing list

  • See public-vocabs@w3.org archives
  • To subscribe, send a message to public-vocabs-request@w3.org with Subject: subscribe (see lists.w3.org for more details).
  • If you are new to the W3C community, you will need to go through the archive approval process before your posts show up in the archives.
  • To edit this wiki, you’ll need a W3C account; these are available to all

Groups who maintain Web Schemas are welcome to use this forum as a feedback channel, in additional to whatever independent mechanisms they also offer.

The following from the charter makes me think that topic maps may be relevant to the task at hand:

Participants are encouraged to use the group to take practical steps towards interoperability amongst diverse schemas, e.g. through development of mappings, extensions and supporting tools. Those participants who maintain vocabularies in any format designed for wide-scale public Web use are welcome to also to participate in the group as a ‘feedback channel’, including practicalities around syntax, encoding and extensibility (which will be relayed to other W3C groups as appropriate).

Posted in Mapping, Schema, W3C | No Comments »