1. The document discusses representing archive catalog data as linked data using semantic web technologies. It involves mapping catalog metadata from XML and CSV formats to RDF and linking to external vocabularies. 2. A system is presented that converts archive catalogs to linked data, stores it using CKAN and provides SPARQL querying. It allows browsing catalog records, performing spatial and temporal queries. 3. An ontology called voc4odw is introduced for organizing open data. It is based on the R4R ontology and aims to semantically enrich catalog records by linking objects, events, places and times using common vocabularies.