A general purpose client to work with any 'OAI-PMH' service. The 'OAI-PMH' protocol is described at http://www.openarchives.org/OAI/openarchivesprotocol.html. The main functions follow the OAI-PMH verbs:
GetRecordIdentifyListIdentifiersListMetadataFormatsListRecordsListSetsInstall from CRAN
install.packages("oai")
Or install the development version from GitHub
devtools::install_github("sckott/oai")
Load oai
library("oai")
id_entify("http://oai.datacite.org/oai")
#> repositoryName baseURL protocolVersion
#> 1 DataCite MDS http://oai.datacite.org/oai 2.0
#> adminEmail earliestDatestamp deletedRecord
#> 1 admin@datacite.org 2011-01-01T00:00:00Z persistent
#> granularity compression compression.1
#> 1 YYYY-MM-DDThh:mm:ssZ gzip deflate
#> description
#> 1 oaioai.datacite.org:oai:oai.datacite.org:12425
list_identifiers(from = '2011-05-01T', until = '2011-09-01T')
#> <ListRecords> 922 X 6
#>
#> identifier datestamp setSpec setSpec.1
#> 1 oai:oai.datacite.org:32153 2011-06-08T08:57:11Z TIB TIB.WDCC
#> 2 oai:oai.datacite.org:32200 2011-06-20T08:12:41Z TIB TIB.DAGST
#> 3 oai:oai.datacite.org:32220 2011-06-28T14:11:08Z TIB TIB.DAGST
#> 4 oai:oai.datacite.org:32241 2011-06-30T13:24:45Z TIB TIB.DAGST
#> 5 oai:oai.datacite.org:32255 2011-07-01T12:09:24Z TIB TIB.DAGST
#> 6 oai:oai.datacite.org:32282 2011-07-05T09:08:10Z TIB TIB.DAGST
#> 7 oai:oai.datacite.org:32309 2011-07-06T12:30:54Z TIB TIB.DAGST
#> 8 oai:oai.datacite.org:32310 2011-07-06T12:42:32Z TIB TIB.DAGST
#> 9 oai:oai.datacite.org:32325 2011-07-07T11:17:46Z TIB TIB.DAGST
#> 10 oai:oai.datacite.org:32326 2011-07-07T11:18:47Z TIB TIB.DAGST
#> .. ... ... ... ...
#> Variables not shown: setSpec.2 (chr), setSpec.3 (chr)
count_identifiers()
#> url count
#> 1 http://oai.datacite.org/oai 7070730
list_records(from = '2011-05-01T', until = '2011-08-15T')
#> <ListRecords> 124 X 44
#>
#> identifier datestamp setSpec setSpec.1
#> 1 oai:oai.datacite.org:32153 2011-06-08T08:57:11Z TIB TIB.WDCC
#> 2 oai:oai.datacite.org:32200 2011-06-20T08:12:41Z TIB TIB.DAGST
#> 3 oai:oai.datacite.org:32220 2011-06-28T14:11:08Z TIB TIB.DAGST
#> 4 oai:oai.datacite.org:32241 2011-06-30T13:24:45Z TIB TIB.DAGST
#> 5 oai:oai.datacite.org:32255 2011-07-01T12:09:24Z TIB TIB.DAGST
#> 6 oai:oai.datacite.org:32282 2011-07-05T09:08:10Z TIB TIB.DAGST
#> 7 oai:oai.datacite.org:32309 2011-07-06T12:30:54Z TIB TIB.DAGST
#> 8 oai:oai.datacite.org:32310 2011-07-06T12:42:32Z TIB TIB.DAGST
#> 9 oai:oai.datacite.org:32325 2011-07-07T11:17:46Z TIB TIB.DAGST
#> 10 oai:oai.datacite.org:32326 2011-07-07T11:18:47Z TIB TIB.DAGST
#> .. ... ... ... ...
#> Variables not shown: title (chr), creator (chr), creator.1 (chr),
#> creator.2 (chr), creator.3 (chr), creator.4 (chr), creator.5 (chr),
#> creator.6 (chr), creator.7 (chr), publisher (chr), date (chr),
#> identifier.2 (chr), identifier.1 (chr), subject (chr), description
#> (chr), description.1 (chr), contributor (chr), language (chr), type
#> (chr), type.1 (chr), format (chr), format.1 (chr), rights (chr),
#> subject.1 (chr), relation (chr), subject.2 (chr), subject.3 (chr),
#> subject.4 (chr), setSpec.2 (chr), setSpec.3 (chr), format.2 (chr),
#> subject.5 (chr), subject.6 (chr), subject.7 (chr), description.2
#> (chr), description.3 (chr), description.4 (chr), description.5 (chr),
#> title.1 (chr), contributor.1 (chr)
get_records(c("oai:oai.datacite.org:32255", "oai:oai.datacite.org:32325"))
#> <GetRecord> 2 X 23
#>
#> identifier datestamp setSpec setSpec.1
#> 1 oai:oai.datacite.org:32255 2011-07-01T12:09:24Z TIB TIB.DAGST
#> 2 oai:oai.datacite.org:32325 2011-07-07T11:17:46Z TIB TIB.DAGST
#> Variables not shown: title (chr), creator (chr), creator.1 (chr),
#> creator.2 (chr), creator.3 (chr), publisher (chr), date (chr),
#> identifier.1 (chr), subject (chr), subject.1 (chr), description
#> (chr), description.1 (chr), contributor (chr), language (chr), type
#> (chr), type.1 (chr), format (chr), format.1 (chr), rights (chr)
list_metadataformats(id = "oai:oai.datacite.org:32348")
#> $`oai:oai.datacite.org:32348`
#> metadataPrefix
#> 1 oai_dc
#> 2 datacite
#> 3 oai_datacite
#> schema
#> 1 http://www.openarchives.org/OAI/2.0/oai_dc.xsd
#> 2 http://schema.datacite.org/meta/nonexistant/nonexistant.xsd
#> 3 http://schema.datacite.org/oai/oai-1.0/oai.xsd
#> metadataNamespace
#> 1 http://www.openarchives.org/OAI/2.0/oai_dc/
#> 2 http://datacite.org/schema/nonexistant
#> 3 http://schema.datacite.org/oai/oai-1.0/
list_sets("http://oai.datacite.org/oai")
#> <ListSets> 1363 X 2
#>
#> setSpec
#> 1 REFQUALITY
#> 2 ANDS
#> 3 ANDS.REFQUALITY
#> 4 ANDS.CENTRE-1
#> 5 ANDS.CENTRE-1.REFQUALITY
#> 6 ANDS.CENTRE-2
#> 7 ANDS.CENTRE-2.REFQUALITY
#> 8 ANDS.CENTRE-3
#> 9 ANDS.CENTRE-3.REFQUALITY
#> 10 ANDS.CENTRE-5
#> .. ...
#> Variables not shown: setName (chr)
Identify
id_entify("http://api.gbif.org/v1/oai-pmh/registry")
#> repositoryName baseURL protocolVersion
#> 1 GBIF Registry http://api.gbif.org/v1/oai-pmh/registry 2.0
#> adminEmail earliestDatestamp deletedRecord granularity
#> 1 dev@gbif.org 2007-01-01T00:00:01Z persistent YYYY-MM-DDThh:mm:ssZ
#> description
#> 1 \n\tGBIF Registry\n\tGlobal Biodiversity Information Facility Secretariat\n\t\n\t\tThe GBIF Registry — the entities that make up the GBIF network.\n\t\tThis OAI-PMH service exposes Datasets, organized into sets of country, installation and resource type.\n\t\tFor more information, see http://www.gbif.org/developer/registry\n\t\n
Get records
get_records(c("816f4734-6b49-41ab-8a1d-1b21e6b5486d", "95e3042f-f48d-4a04-8251-f755bebeced6"),
url = "http://api.gbif.org/v1/oai-pmh/registry")
#> <GetRecord> 2 X 29
#>
#> identifier datestamp
#> 1 816f4734-6b49-41ab-8a1d-1b21e6b5486d 2016-01-28T15:36:07Z
#> 2 95e3042f-f48d-4a04-8251-f755bebeced6 2016-01-24T23:01:17Z
#> Variables not shown: setSpec (chr), setSpec.1 (chr), setSpec.2 (chr),
#> title (chr), publisher (chr), identifier.1 (chr), source (chr),
#> description (chr), description.1 (chr), type (chr), language (chr),
#> format (chr), source.1 (chr), subject (chr), subject.1 (chr),
#> subject.2 (chr), subject.3 (chr), subject.4 (chr), subject.5 (chr),
#> description.2 (chr), creator (chr), creator.1 (chr), date (chr),
#> rights (chr), coverage (chr), coverage.1 (chr), coverage.2 (chr)
Identify
id_entify("http://www.biodiversitylibrary.org/oai")
#> repositoryName
#> 1 Biodiversity Heritage Library OAI Repository
#> baseURL protocolVersion
#> 1 http://www.biodiversitylibrary.org/oai 2.0
#> adminEmail earliestDatestamp deletedRecord granularity
#> 1 oai@biodiversitylibrary.org 2006-01-01 no YYYY-MM-DD
#> description
#> 1 \n\t\t\n\t\t\toai\n\t\t\tbiodiversitylibrary.org\n\t\t\t:\n\t\t\toai:biodiversitylibrary.org:item/1000\n\t\t\n\t
Get records
get_records(c("oai:biodiversitylibrary.org:item/7", "oai:biodiversitylibrary.org:item/9"),
url = "http://www.biodiversitylibrary.org/oai")
#> <GetRecord> 2 X 32
#>
#> identifier datestamp setSpec
#> 1 oai:biodiversitylibrary.org:item/7 2016-01-26T05:05:20Z item
#> 2 oai:biodiversitylibrary.org:item/9 2016-01-26T05:05:20Z item
#> Variables not shown: title (chr), creator (chr), creator.1 (chr),
#> creator.2 (chr), subject (chr), subject.1 (chr), subject.2 (chr),
#> subject.3 (chr), subject.4 (chr), subject.5 (chr), subject.6 (chr),
#> subject.7 (chr), subject.8 (chr), subject.9 (chr), subject.10 (chr),
#> subject.11 (chr), subject.12 (chr), subject.13 (chr), subject.14
#> (chr), subject.15 (chr), description (chr), publisher (chr),
#> contributor (chr), date (chr), type (chr), type.1 (chr), identifier.1
#> (chr), language (chr), rights (chr)