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Search in the data

Using the endpoint /search one can search through all the data for a specific string. Another way of using this endpoint is to filter for a specific property. See examples

Usage

/search?

    [q=query]
    [&filter=path_to_property:value]
    [&sort=path_to_property:[asc|desc]
    [&size=N]
    [&from=N]
    [&format=[json|jsonl|nt|nq|ttl|rdf]]

The following GET-parameter are available:

Name Type Description
q= string Query string to be searched in all indexed data. See example
filter= string Filter the search result for one property:value pair. See example
sort= string Sort the datasets by a specified property. Allowed sorting options are asc or desc. See example
size= integer Number of datasets that should be returned by the search. Default: 10
from= integer Offset from where to begin returning size-number of datasets. Default: 0
format= string Format in which the data should be reported by the API. Default: json. See Content-Type

Searching results can be refined through the use of bolean operators (AND, OR, AND NOT), phrase search using "", and truncation using *. See advanced example

Furthermore a search can be performed using

Content-Type of return data

The Content-Type of the returned datasets is defined by the format property. Following values are allowed and lead to the correspondingly formatted answer:

  • json - plain json (default)
  • jsonl - line delimited json
  • nt - N-triples
  • rdf - RDF
  • ttl - Turtle
  • nq - N-quads

Examples

Some of the below examples we use the json-manipulating tool jq to reduce the output for overview’s sake. For more information on how to use jq, see their tutorial.

Simple Query 

$ curl -X GET "https://data.slub-dresden.de/search?q=SLUB&size=1" -H "accept: application/json"
[{"@context":"https://raw.githubusercontent.com/slub/esmarc/master/conf/context.jsonld","@id":"https://data.slub-dresden.de/resources/1172980497","@type":"http://schema.org/CreativeWork","about":[{"@id":"https://rvk.uni-regensburg.de/api/json/ancestors/AN 80190","identifier":{"@type":"PropertyValue","propertyID":"RVK","value":"AN 80190"},"keywords":["Allgemeines","Buch- und Bibliothekswesen, Informationswissenschaft","Bibliothekswesen","Bibliothekswesen in einzelnen L\u00e4ndern und einzelne Bibliotheken","Einzelne deutsche Bibliotheken","Bibliotheken D","Dresden","S\u00e4chsische Landesbibliothek - Staats- und Universit\u00e4tsbibliothek"],"name":"S\u00e4chsische Landesbibliothek - Staats- und Universit\u00e4tsbibliothek","sameAs":["http://swb.bsz-bw.de/DB=2.1/PPNSET?PPN=1270680919"]},{"@id":"https://rvk.uni-regensburg.de/api/json/ancestors/AN 67700","identifier":{"@type":"PropertyValue","propertyID":"RVK","value":"AN 67700"},"keywords":["Allgemeines","Buch- und Bibliothekswesen, Informationswissenschaft","Bibliothekswesen","Bibliotheksarten","Wissenschaftliche Bibliotheken"],"name":"Wissenschaftliche Bibliotheken","sameAs":["http://swb.bsz-bw.de/DB=2.1/PPNSET?PPN=1270679430"]}],"alternateName":["SLUB"],"alternativeHeadline":"S\u00e4chsisches Staatsministerium der Finanzen. Staatshochbauamt Dresden. [Text Michael Bartsch]","contributor":[{"@id":"https://data.slub-dresden.de/persons/1230186379","name":"Bartsch, Michael"},{"@id":"https://data.slub-dresden.de/organizations/103636129","name":"Sachsen","sameAs":"http://d-nb.info/gnd/5035101-1"}],"dateModified":"2016-05-11T07:07:48Z","datePublished":"2002","inLanguage":["ger"],"isBasedOn":"https://data.slub-dresden.de/source/kxp-de14/1172980497","mentions":[{"@id":"https://data.slub-dresden.de/organizations/191800287","@type":"http://schema.org/Organization","name":"S\u00e4chsische Landesbibliothek - Staats- und Universit\u00e4tsbibliothek Dresden","sameAs":"http://d-nb.info/gnd/5165770-3"},{"@id":"https://data.slub-dresden.de/organizations/105510602","name":"Geb\u00e4ude","sameAs":"http://d-nb.info/gnd/4156127-2"}],"name":"S\u00e4chsische Landesbibliothek - Staats- und Universit\u00e4tsbibliothek Dresden","publisher":{"@type":"Organization","location":{"name":"Dresden","type":"Place"},"name":"Freistaat Sachsen, Staatsministerium der Finanzen"},"sameAs":["http://swb.bsz-bw.de/DB=2.1/PPNSET?PPN=1172980497"]}]

Field Query

One can query a field directly by using q=field[.subfield]:querystring. A detailed description of the query syntax can be found within the Elasticsearch documentation

curl -X GET "https://data.slub-dresden.de/search?q=preferredName:SLUB" -H "accept: application/json" | jq '.[].preferredName'
"[SLUB Dresden]"
"Test SLUB Dresden"
"Innenansichten SLUB 2010"
"Der Weg zur SLUB"
"Der Neubau der SLUB"
"Seniorenschulungen an der SLUB"
"SLUB präsentiert Handschriftendatenbank neu"
"Nachgefragt: Nutzer beurteilen SLUB positiv"
"Umstellung des Mailsystems der SLUB"
"Und sonntags in die SLUB!"

Filtered Query

Filters must be given in the form property:value, where property can be a path concatenated by dots (“.”).

Special characters like @, :, and / need to be escaped using Percent-encoding

Example for valid filters:

property/path value filter string
@type http://schema.org/Organization %40type%3Ahttp%3A%2F%2Fschema.org%2FOrganization
publisher.location.name Dresden publisher.location.name%3ADresden 
$ curl -X GET "https://data.slub-dresden.de/search?q=SLUB&filter=%40type%3Ahttp%3A%2F%2Fschema.org%2FOrganization&size=1" -H "accept: application/json"
[{"@context":"https://raw.githubusercontent.com/slub/esmarc/master/conf/context.jsonld","@id":"https://data.slub-dresden.de/organizations/810619911","@type":"http://schema.org/Organization","alternateName":["Bereichsbibliothek DrePunct","SLUB-Bereichsbibliothek DrePunct"],"dateModified":"2019-03-17T12:34:00Z","isBasedOn":"https://data.slub-dresden.de/source/swb-aut/810619911","location":{"@id":"https://data.slub-dresden.de/geo/106345745","description":"Ort","name":"Dresden","sameAs":"https://d-nb.info/gnd/4012995-0"},"preferredName":"S\u00e4chsische Landesbibliothek - Staats- und Universit\u00e4tsbibliothek Dresden. Bereichsbibliothek DrePunct","sameAs":[{"@id":"http://viaf.org/viaf/311738120","isBasedOn":{"@id":"http://hub.culturegraph.org/entityfacts/1063133823","@type":"Dataset"},"publisher":{"@id":"https://data.slub-dresden.de/organizations/100092306","abbr":"VIAF","preferredName":"Virtual International Authority File (VIAF)"}},{"@id":"http://swb.bsz-bw.de/DB=2.1/PPNSET?PPN=810619911","isBasedOn":{"@id":"https://data.slub-dresden.de/source/swb-aut/810619911","@type":"Dataset"},"publisher":{"@id":"https://data.slub-dresden.de/organizations/103302212","abbr":"KXP","preferredName":"K10Plus"}},{"@id":"https://d-nb.info/gnd/1063133823","isBasedOn":{"@id":"https://data.slub-dresden.de/source/swb-aut/810619911","@type":"Dataset"},"publisher":{"@id":"https://data.slub-dresden.de/organizations/514366265","abbr":"DNB","preferredName":"Deutsche Nationalbibliothek"}}]}]

Sorted Query

For sorting a property (-path) must be defined (compare Filtered Query example) as this will be the property where the sorting is applied to.

$ curl -X GET "https://data.slub-dresden.de/search?q=Moldau&sort=publisher.location.name:asc" | jq '.[] | {title: .preferredName, location: .publisher.location.name }' 
{
  "title": "Wirksamkeit der EU-Unterstützung für Belarus, Moldau und die Ukraine im Bereich Freiheit, Sicherheit und Recht (gemäß Artikel 248 Absatz 4 Unterabsatz 2 des EG-Vertrags)",
  "location": " Luxemburg"
}
{
  "title": "Střední Povltaví",
  "location": " Praha"
}
{
  "title": "Friedrich Smetana, \"Die Moldau\"",
  "location": "Altenmedingen"
}
{
  "title": "Stifterrecht und Kirchenpatronat im Fürstentum Moldau und in der Bukowina eine historisch-dogmatische Studie zum morgenländischen Kirchenrecht",
  "location": "Amsterdam"
}
{
  "title": "Greece your strategic partner in the new millennium",
  "location": "Athens"
}
{
  "title": "Art und Entwicklung der Bodenerosion in Südrussland",
  "location": "Bad Godesberg"
}
{
  "title": "Konfliktmanagement und Konfliktprävention im Rahmen von OSZE-Langzeitmissionen eine Analyse der Missionen in Moldau und Estland",
  "location": "Baden-Baden"
}
{
  "title": "Die Verfassung der Sozialistischen Föderativen Republik Jugoslawien  = Ustav Sozialističke Federativne Republike Jugoslavije",
  "location": "Beograd"
}
{
  "title": "Grundriss der polnischen Verfassungsgeschichte",
  "location": "Berlin"
}
{
  "title": "Feld-, Noth- und Belagerungsmünzen von Deutschland, Österreich-Ungarn, Siebenbürgen, Moldau, Dänemark, Schweden, Norwegen, Russland, Polen u.s.w.",
  "location": "Berlin"
}

Advanced Example

To find a entry with the title Carbonverstärkt entspannen erster SLUB-Lounger aus Textilbeton eingeweiht lets use only the two words SLUB and textil. To do so we have to combine both in the following way:

curl -X GET "https://data.slub-dresden.de/search?q=preferredName:(textil*%20AND%20SLUB)" | jq '.[].preferredName'
"Carbonverstärkt entspannen erster SLUB-Lounger aus Textilbeton eingeweiht"

Textilbeton is matched by textil* and both strings are combined with the AND operator. Note, that the spaces have to be escsaped as %20 according to Percent-encoding

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