RDF - Down the Code Mine

Processing Historical Dates

In Project Omega at The National Archives processing of Historical Dates is complicated if the context of the dates is unknown. Software Engineers must consider, Calendars, Time-zones, and Geography. This is further compounded when tools (e.g. Java) take different/unexpected approaches to dates.

RDF

Reusing Standard RDF Vocabularies - Part 2

Following on from Part 1, we look at a further example of trade-offs and compromise that I made with regards to reusing existing RDF vocabularies in Project Omega at The National Archives; thus reinforcing our earlier position on reuse through a different example.

RDF

Reusing Standard RDF Vocabularies - Part 1

For Project Omega at The National Archives, we are reusing existing RDF vocabularies for our new Catalogue. I examine what happens when a suitable property or class cannot be found within an existing vocabulary, and weigh-up the different approaches and compromises that may need to be made.

Extreme Identifiers (for use in URIs)

Recently I have been thinking about how Identifiers for things should be constructed. More specifically, as part of Project Omega for TNA (The National Archives), I have been thinking about identifiers for resources

The National Archives

Archival Catalogue Record Identifiers

For The National Archives, we examine existing schemes for identifying Archival Catalogue Records. We then propose a new modern scheme suitable for use by both humans and URI for Linked Data: Omega Catalogue Identifiers.

ETL

RDF Plugins for Pentaho KETTLE

For The National Archives we developed and open sourced custom workflow step plugins for Pentaho Kettle which use Apache Jena to allow you to generate RDF output.