This is a copy - with a related change of the main URL of the ontology - of the Error Ontology (imported by PWO) and previously available at http://www.essepuntato.it/2009/10/error. It has been imported here in SPAR for guaranteeing its long-term sustainability.

The directory docs contains all the files related to the ontology, its versions in time, and the related documentations. In particular, it includes:

• the current directory, where the files of the current version of the ontology are stored;
• one yyyy-mm-dd version directory for each of the versions of the ontology developed.

The current directory contains a .owl file named after the lowercase ontology acronym, which is the source of the ontology in a particular format between RDF/XML, Turtle, N-triples, or JSON-LD. In addition to this file, the directory includes five other files, named in the same way and with the following extensions specifying each of five different formats: .xml (RDF/XML), .ttl (Turtle), .nt (Ntriple), .json (JSON-LD), .html (HTML, i.e. the human readable documentation of the ontology). All the images used in the documentation should additionally be included in this .html directory.

The version directories (i.e. yyyy-mm-dd) contains the same kinds of files as those included in the current directory, but specific for that particular version. However, the .owl file should be present only in the current directory.