Guidelines for the Construction, Format, and Management of Monolingual Controlled Vocabularies
Presents guidelines and conventions for the contents, display, construction, testing, maintenance, and management of monolingual controlled vocabularies. It focuses on controlled vocabularies that are used for the representation of content objects in knowledge organization systems including lists, synonym rings, taxonomies, and thesauri.
Thesauri and interoperability with other vocabularies Part 1: Thesauri for information retrieval
Gives recommendations for the development and maintenance of thesauri intended for information retrieval applications, whether monolingual or multilingual. It is applicable to vocabularies used for retrieving information from all types of information resources, irrespective of the media used (text, sound, still or moving image, physical object or multimedia) including knowledge bases and portals, bibliographic databases, text, museum or multimedia collections, and the items within them. This part of ISO 25964 also provides a data model and recommended format for the import and export of thesaurus data.
Thesauri and interoperability with other vocabularies Part 2: Thesauri and interoperability with other vocabularies
Covers supplementing thesauri with complementary use of vocabularies, providing key characteristics of each vocabulary type, the semantic components and relationships supported by the vocabulary type, and, where applicable, guidelines for mapping the vocabulary to a thesaurus constructed to the standard of Part 1.
OWL 2 Web Ontology Language Document Overview (Second Edition) 
The OWL 2 Web Ontology Language, informally OWL 2, is an ontology language for the Semantic Web with formally defined meaning. OWL 2 ontologies provide classes, properties, individuals, and data values and are stored as Semantic Web documents. OWL 2 ontologies can be used along with information written in RDF, and OWL 2 ontologies themselves are primarily exchanged as RDF documents.
This document serves as an introduction to OWL 2 and the various other OWL 2 documents. It describes the syntaxes for OWL 2, the different kinds of semantics, the available profiles (sub-languages), and the relationship between OWL 1 and OWL 2.