What is Quality ? “Best value for the money” According to this definition, you are entitled to get high performance from a costly product; likewise a low cost product or service is expected to be a poor delivery. For example, a loose demo delivery is both predictable and acceptable, since its quality is: low conformance / low cost.
What is Quality ? “Good Quality is Nominal Conformance” Taxonomy Quality is defined as Taxonomy Conformance to: Valid requirements; Explicitly documented development standards; and, Implicit characteristics that are expected of all professionally developed taxonomies, such as the desire for good maintainability.
Standards ISO 2788-1986 International Organization for Standardization. Documentation—Guidelines for the Establishment and Development of Monolingual Thesauri. 2nd ed. n.p.: ISO, 1986. (ISO 2788- 1986(E)). (Available in the U.S. from American National Standards Institute) ISO 5964-1985 International Organization for Standardization. Documentation—Guidelines for the Establishment and Development of Multilingual Thesauri. n.p.: ISO, 1985. (ISO 5964-1985(E)). (Available in the U.S. from American National Standards Institute) ANSI/NISO Z39.19-1993 National Information Standards Institute. Guidelines for the Construction, Format, and Management of Monolingual Thesauri. Bethesda, MD: NISO Press, 1994. 69p. (ANSI/NISO Z39.19-1993) SEMIO Quality Plan v1 2000 ISO/IEC 13250 Topic Maps RDF Please refer to RDF at http://www.w3.org/RDF and XML at http://www/w3/org/XMLhttp://www.w3.org/RDFhttp://www/w3/org/XML
Lexicon Vocabularies, etc. Substitutions: Acronyms, Synonyms, etc. Preferred Keywords: Brand Names, etc. Banned Keywords
Typical Patterns Lack of requirements Use Librarian Resources
Ontology Thesaurus ? Is the information domain analysis complete, consistent, and accurate ? Is the partitioning of the problem complete ?
Typical Patterns Directory versus Taxonomy Isolate “directory” branches Thesaurus versus Taxonomy Put an ontology on top of thesaurus Check ASAP match of thesaurus generics with extracted lexicon Very high level design for top categories requirements Plan to work bottom-up See also Taxonomy (functions, combinations, etc.)
Install Implementation / Integration: Are external and internal interfaces properly defined? Are all requirements traceable to the system level? Has prototyping been conducted for the user/customer? Is performance achievable within the constraints imposed by other system elements? Are requirements consistent with schedule, resources, and budget?
Complexity Index Cyclometric complexity increases with number of Cross References within the Taxonomy, giving an indication of complexity and difficulty of testing. Taxonomy Complexity Index combines: autonomy closure similarity typicality commonality redundancy stability
Maturity index The IEEE standard 982.1-1988 suggests a taxonomy maturity index to provide an indication of the stability of the taxonomy. Maturity Index combines: number of modules in current ontology / taxonomy. number of modules in current ontology / taxonomy that have been changed. number of modules added to current ontology / taxonomy. number of modules deleted from the previous version of the ontology / taxonomy.