Figure 1
The ARCHE metadata schema and its main classes, including their sub-classes (rounded boxes). Instances of a class are detailed with object properties and data type properties (connectors with labels starting with ‘acdh:’). Object properties connect an instance of class with another instance of a class, e.g. a place or a person is related to a RepoObject (e.g. a Collection) via the property acdh:hasSpatialCoverage or acdh:hasContributor. A data type property is used to include a string value, e.g. the subject via acdh:hasSubject (connector ends in a square box). Object properties can also be used to connect to a class from another schema, e.g. to a skos:Concept, via acdh:hasLanguage or acdh:hasCategory.
Figure 2
Example of how metadata enrichment leads to merging entities in ARCHE. First a new collection with a related place is ingested and results in the creation of a new RDF node for a place. Then further information for this node is fetched. Based on a matching identifier with an existing place node, these two can be merged and the identifiers are accumulated.
Table 1
Identifiers and preferred labels for Ferdinand I, Holy Roman Emperor.
| IDENTIFIERS AND PREFERRED LABELS FOR FERDINAND I, HOLY ROMAN EMPEROR | |
|---|---|
| IDENTIFIER | PREFERRED LABEL |
| https://id.acdh.oeaw.ac.at/ferdinandIhrr | Ferdinand I., Heiliges Römisches Reich, Kaiser |
| http://id.loc.gov/rwo/agents/n82050986 | Ferdinand I, Holy Roman Emperor, 1503–1564 |
| http://viaf.org/viaf/51698517 | Lists 280 variants |
| http://www.wikidata.org/entity/Q150611 | Ferdinand I, Holy Roman Emperor |
| https://d-nb.info/gnd/1089109938 | Redirect to https://d-nb.info/gnd/118532502 |
| https://d-nb.info/gnd/1089740514 | Redirect to https://d-nb.info/gnd/118532502 |
| https://d-nb.info/gnd/118532502 | Ferdinand I., Heiliges Römisches Reich, Kaiser |
| https://d-nb.info/gnd/1243972378 | Redirect to https://d-nb.info/gnd/118532502 |
| https://isni.org/isni/0000000110266433 | Lists variants |
Figure 3
Excerpt from the list of supported sources for external identifiers acceptable in ARCHE. Each source is described with a name, a regular expression to match and fetch the actual ID from a given URI, and a normalised URI to replace whatever URI was submitted. Furthermore, to fetch information from these sources, the URI resolving to RDF along with a request format is indicated. The List is available on GitHub: https://github.com/acdh-oeaw/arche-assets/blob/master/AcdhArcheAssets/uriNormRules.json.
Figure 4
SKOS vocabulary for ISO 639-3 language codes in the ACDH Vocabs Service. Links to equivalent and exactly matching concepts are included as well.