Blogs

An organization ontology : Requirements

Background

The data.gov.uk linked data project found itself in need on an ontology or vocabulary to support linked data publishing of government organizational information. A check for existing ontologies didn't turn up an ideal solution so we decided to develop one.

Semantic Data Exchange

Semantic Data Exchange (SDX) was an investigation project looking at the role of information intermediaries for government linked data. This was a project funded by TSB (Technology Strategy Board). The work on SDX led to, supported and eventually exploited the Linked Data API we jointly developed with Jeni Tennison and Leigh Dodds.

We gave a brief presentation on the study at the "Collaboration Nation - Digital Britain" event in March 2010. Here are the slides from that:

Using Interval Set URIs in Statistical Data

Statistical publications generally include at least one dimension comprised of the time intervals over which data has been aggregated. Linked data vocabularies for representing statistical information, such as SCOVO and current SDMX/Linked-Data collaborative activities refer to time intervals as 'things' or 'objects' rather than as literal values. This will typically involves the assignment of a URI so that multiple references can be made to the same interval.

Epimorphics designing ECO, a core domain ontology for Life Cycle Analysis

As the next step in developing the Earthster vision of creating a web of linked open sustainability data, Epimorphics is designing a core domain ontology for representing Life Cycle Analysis information about products. The Earthster Core Ontology (ECO) is a core domain ontology for life cycle analysis which is capable of representing models of product supply chains with inputs and outputs to and from nature and flow of goods and services through the supply chain. The first draft of ECO is planned to be ready for consultation in March 2010.

Will linked data on data.gov.uk survive an election?

Last week I attended a cross-political party dinner given by the Technology Strategy Board(TSB) to promote their Digital Britain programme to policy-makers. There were about 20 of us there – mostly politicians, a number of people from the TSB and a few people from industry.

An RDF to JSON converter on Google App Engine

As part of our work on the SDX project we felt one requirement was to enable typical web developers to exploit the RDF linked data in a simpler, more developer friendly form. In particular it would be nice to be able to access an RDF model of a resource as JSON to simply using it from ajax clients.

Generating RDF from CSV - example using xlwrap

Although there is a dump of the RDF data from CKAN available on-line, it's the full CKAN dataset and not the UK Government-specific set. For some ongoing experiments, I want some CKAN data in RDF for the published government data listed on data.hmg.gov.uk. The source data is published, however, in CSV and JSON format.

Why Epimorphics?

First and foremost it’s a nice name. And no-one’s used it before. But it does have some significance.

Our goal in building linked data solutions is to provide complete solutions to particular problems by bringing together data from multiple sources – and our name tries to capture this goal.

Combining data from multiple sources involves transforming the ontologies of all the different data sources into a combined ontology describing all the data.

RDF Result sets

[This entry is a cross-post of an earlier personal blog post.]

In some recent semantic web applications, where we’ve been creating user interfaces over REST style interfaces over RDF data sets, we found a common pattern emerging – ResultSets. The approach we took has been documented but it’s buried in other details so I’d like to pull out the essential pattern in this post.

Situation

OWL 2 for RDF Vocabularies

[This entry is a cross-post of an earlier personal blog post.]