Isbd namespaces

ISBD for the Semantic Web: namespaces, elements, vocabularies, application profile,[object Object],Gordon Dunsire,[object Object],Presented at the seminar Libraries and the Semantic Web: the role of International Standard Bibliographic Description (ISBD), National Library of Scotland, Edinburgh, 25 Feb 2011 ,[object Object]

Semantic Web,[object Object],“machine-readable metadata”,[object Object],Faster! 24/7/365! Global!,[object Object],Metadata expressed as “atomic” statements,[object Object],A simple, single, irreducible statement,[object Object],The title of this book is “Treasure island”,[object Object],In a standard machine-processable format,[object Object],Resource Description Framework (RDF),[object Object]

Resource Description Framework,[object Object],Metadata statement constructed in 3 parts,[object Object],“Triple”,[object Object],The title of this book is “Treasure island”,[object Object],Subject of the statement = Subject: This book,[object Object],Nature of the statement = Predicate: has title,[object Object],Value of the statement = Object: “Treasure island”,[object Object],This book – has title – “Treasure island”,[object Object],subject – predicate - object,[object Object]

Identifiers,[object Object],Need unambiguous way of identifying each part of the triple for efficient machine-processing,[object Object],Human labels (“This book”, “has title”) no good,[object Object],Same thing, different labels; different things, same label,[object Object],Exploit the utility of the URL,[object Object],Machine-readable, regular syntax, unambiguous,[object Object],Uniform Resource Identifier (URI),[object Object]

Uniform Resource Identifier,[object Object],Can be any unique combination of numbers and letters,[object Object],No intrinsic meaning; it’s just an identifying label,[object Object],Can look like a URL,[object Object],http://iflastandards.info/ns/isbd/elements/P1001,[object Object],But does not lead to a Web page (in principle ...),[object Object],RDF requires the subject and predicate of triple to be URIs,[object Object],Object can be a URI, or a literal string (“Treasure island”),[object Object]

Namespaces,[object Object],URI can be constructed from a base plus a unique, identifying suffix,[object Object],http://iflastandards.info/ns/isbd/elements/,[object Object],+ P1001,[object Object],Base is known as a namespace,[object Object],Can be abbreviated by human programmer,[object Object],“isbd” = http://iflastandards.info/ns/isbd/elements/,[object Object],isbd:P1001,[object Object],Machine expands abbreviation for processing,[object Object]

Everything as triples in RDF,[object Object],Every aspect of the metadata must be expressed in RDF to be machine-processable,[object Object],Metadata about real-world objects (books, people, etc.),[object Object],Metadata about the predicates (definition, label, scope, etc.),[object Object],Common predicates apply to many types of thing (human-readable label, etc.),[object Object],High-level RDF namespaces (rdfs, owl),[object Object],RDF is expressed in RDF (“bootstrap”),[object Object]

Creating namespaces and URIs,[object Object],ISBD is using the Open Metadata Registry,[object Object],Can assign a running “number” to the base to create a new URI,[object Object],Set of properties for creating basic triples,[object Object],Properties = predicates,[object Object],rdfs:label for assigning a human-readable label to the subject,[object Object],isbd:P1001 - rdfs:label - “has content form”,[object Object]

Subject,[object Object],Predicate,[object Object],Object,[object Object],isbd:P1001,[object Object],rdfs:label,[object Object],“has content form”,[object Object]

Subject,[object Object],Predicate,[object Object],Object,[object Object],isbdcf:T1008,[object Object],skos:prefLabel,[object Object],“spoken word”,[object Object]

Application profile,[object Object],Need a way to specify how a useful “record” can be constructed from RDF triples,[object Object],Which triples are involved, and from which namespaces?,[object Object],Sequence? Repeatable? Mandatory?,[object Object],Sub-component aggregations,[object Object],Publication statement = place + name + date,[object Object],Content rules?,[object Object]

Mandatory,[object Object],Not repeatable,[object Object],Aggregation of simpler elements,[object Object],Syntax of aggregation (punctuation),[object Object]

Isbd namespaces

Isbd namespaces

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Isbd namespaces