mc2skos 0.4.0

Synthesized number components

Components of synthesized numbers explicitly described in 765 fields are expressed using the mads:componentList property, and to preserve the order of the components, we use RDF lists. Example:

@prefix mads: <http://www.loc.gov/mads/rdf/v1#> .

<http://dewey.info/class/001.30973/e23/> a skos:Concept ;
    mads:componentList (
        <http://dewey.info/class/001.3/e23/>
        <http://dewey.info/class/1--09/e23/>
        <http://dewey.info/class/2--73/e23/>
    ) ;
    skos:notation "001.30973" .

Retrieving list members in order is surprisingly hard with SPARQL. Retrieving ordered pairs is the best solution I’ve come up with so far:

PREFIX mads: <http://www.loc.gov/mads/rdf/v1#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX skos: <http://www.w3.org/2004/02/skos/core#>

SELECT ?c1_notation ?c1_label ?c2_notation ?c2_label
WHERE { GRAPH <http://localhost/ddc23no> {

    <http://dewey.info/class/001.30973/e23/> mads:componentList ?l .
        ?l rdf:rest* ?sl .
        ?sl rdf:first ?e1 .
        ?sl rdf:rest ?sln .
        ?sln rdf:first ?e2 .

        ?e1 skos:notation ?c1_notation .
        ?e2 skos:notation ?c2_notation .

        OPTIONAL {
            ?e1 skos:prefLabel ?c1_label .
        }
        OPTIONAL {
            ?e2 skos:prefLabel ?c2_label .
        }
}}

Additional processing for data from WebDewey

The script is supposed to work with any MARC21 classification data, but also supports the non-standard ess codes supplied in WebDewey data to differentiate between different types of notes.

Notes that are currently not treated in any special way:

• 253 having $9 ess=nsx Do-not-use.

• 253 having $9 ess=nce Class-elsewhere

• 253 having $9 ess=ncw Class-elsewhere-manual

• 253 having $9 ess=nse See.

• 253 having $9 ess=nsw See-manual.

• 353 having $9 ess=nsa See-also

• 683 having $9 ess=nbu Preference note

• 683 having $9 ess=nop Options note

• 683 having $9 ess=non Options note

• 684 having $9 ess=nsm Manual note

• 685 having $9 ess=ndp Discontinued partial

• 685 having $9 ess=nrp Relocation

• 689 having $9 ess=nru Sist brukt i…