> For the complete documentation index, see [llms.txt](https://opendata-cityofathens-gr.gitbook.io/guides/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://opendata-cityofathens-gr.gitbook.io/guides/texnika-egxeiridia/harvesting/typoi-harvesters/dcat-harvester/paradeigma-dcat-ap-3-rdf-xml.md).

# Παράδειγμα DCAT-AP 3 (RDF/XML)

Το παρακάτω αποτελεί ενδεικτικό παράδειγμα πλήρως δομημένου καταλόγου συμβατού με DCAT-AP 3, όπως αναμένεται από το κεντρικό σύστημα συγκομιδής.

```xml
<?xml version="1.0" encoding="utf-8"?>
<rdf:RDF
  xmlns:dct="http://purl.org/dc/terms/"
  xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
  xmlns:hydra="http://www.w3.org/ns/hydra/core#"
  xmlns:dcat="http://www.w3.org/ns/dcat#"
  xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#"
  xmlns:vcard="http://www.w3.org/2006/vcard/ns#"
  xmlns:foaf="http://xmlns.com/foaf/0.1/"
  xmlns:owl="http://www.w3.org/2002/07/owl#"
  xmlns:dcatap="http://data.europa.eu/r5r/"
  xmlns:ns1="http://data.europa.eu/eli/ontology#"
>

  <hydra:PagedCollection rdf:about="https://demo.opendata.example/catalog.rdf?page=1">
    <hydra:firstPage>https://demo.opendata.example/catalog.rdf?page=1</hydra:firstPage>
    <hydra:first>https://demo.opendata.example/catalog.rdf?page=1</hydra:first>
    <hydra:lastPage>https://demo.opendata.example/catalog.rdf?page=1</hydra:lastPage>
    <hydra:last>https://demo.opendata.example/catalog.rdf?page=1</hydra:last>
    <hydra:totalItems rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">1</hydra:totalItems>
    <hydra:itemsPerPage rdf:datatype="http://www.w3.org/2001/XMLSchema#integer">50</hydra:itemsPerPage>
  </hydra:PagedCollection>

  <dcat:Catalog rdf:about="https://demo.opendata.example">
    <dct:title>Παραδειγματικός Κατάλογος Ανοικτών Δεδομένων</dct:title>
    <foaf:homepage rdf:resource="https://demo.opendata.example"/>
    <dct:language>el</dct:language>
    <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2026-02-11T17:42:06.054417</dct:modified>

    <dcat:dataset>
      <dcat:Dataset rdf:about="https://demo.opendata.example/dataset/03237f58-c11b-4be4-9f3b-311432bf7564">
        <dct:title xml:lang="el">Σταθμοί Περιβαλλοντικών Μετρήσεων (Δείγμα)</dct:title>
        <dct:title xml:lang="en">Environmental Monitoring Stations (Sample)</dct:title>

        <dct:description xml:lang="el">
          Ανοικτό γεωχωρικό σύνολο δεδομένων με σημεία σταθμών μέτρησης και βασικούς δείκτες
          (ενδεικτικά: PM2.5, PM10, NO2) για την περίοδο αναφοράς.
        </dct:description>
        <dct:description xml:lang="en">
          Open geospatial dataset with monitoring station points and basic indicators.
        </dct:description>

        <dct:identifier>03237f58-c11b-4be4-9f3b-311432bf7564</dct:identifier>
        <owl:versionInfo>1</owl:versionInfo>

        <dct:accrualPeriodicity rdf:resource="http://publications.europa.eu/resource/authority/frequency/NOT_PLANNED"/>
        <dcat:keyword>περιβάλλον</dcat:keyword>
        <dcat:keyword>ποιότητα αέρα</dcat:keyword>
        <dcat:keyword>γεωχωρικά</dcat:keyword>

        <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2026-02-11T16:09:32.823043</dct:issued>
        <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2026-02-11T17:42:06.054417</dct:modified>

        <dcat:landingPage rdf:resource="https://demo.opendata.example/dataset/preview/03237f58-c11b-4be4-9f3b-311432bf7564"/>
        <dct:type rdf:resource="http://publications.europa.eu/resource/authority/dataset-type/GEOSPATIAL"/>
        <dcat:theme rdf:resource="http://publications.europa.eu/resource/authority/data-theme/ENVI"/>
        <dct:accessRights rdf:resource="http://publications.europa.eu/resource/authority/access-right/PUBLIC"/>

        <dcat:distribution rdf:resource="https://demo.opendata.example/dataset/03237f58-c11b-4be4-9f3b-311432bf7564/resource/df5d86c7-697b-4fde-b994-f5b062c5ae2e"/>
        <dcatap:applicableLegislation rdf:resource="https://demo.opendata.example/legal/open-data"/>
        <dcatap:hvdCategory rdf:resource="http://data.europa.eu/bna/c_ac64a52d"/>
        <dcat:contactPoint rdf:resource="https://demo.opendata.example/uri"/>
        <dct:publisher rdf:resource="https://demo.opendata.example/uri/publisher"/>

        <dct:temporal>
          <dct:PeriodOfTime rdf:nodeID="N04791d4d0bdd490e8ca004fd93accfe3">
            <dcat:startDate rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2026-02-01</dcat:startDate>
            <dcat:endDate rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2026-02-28</dcat:endDate>
          </dct:PeriodOfTime>
        </dct:temporal>

        <dct:spatial>
          <dct:Location rdf:nodeID="Ne09c033429cd442991beaed5badb5e7b">
            <dcat:bbox rdf:datatype="http://www.opengis.net/ont/geosparql#wktLiteral">
              POLYGON ((22.9095 40.5755, 22.9905 40.5755, 22.9905 40.6500, 22.9095 40.6500, 22.9095 40.5755))
            </dcat:bbox>
          </dct:Location>
        </dct:spatial>

      </dcat:Dataset>
    </dcat:dataset>
  </dcat:Catalog>

  <foaf:Agent rdf:about="https://demo.opendata.example/uri/publisher">
    <foaf:name>Φορέας Διάθεσης Ανοικτών Δεδομένων (Δείγμα)</foaf:name>
    <foaf:homepage rdf:resource="https://demo.opendata.example/organization/open-data-publisher"/>
    <dct:type rdf:resource="http://purl.org/adms/publishertype/PublicOrganisation"/>
    <vcard:hasEmail rdf:resource="mailto:info@opendata.example"/>
    <dct:identifier>09876543456789</dct:identifier>
  </foaf:Agent>

  <dcat:Distribution rdf:about="https://demo.opendata.example/dataset/03237f58-c11b-4be4-9f3b-311432bf7564/resource/df5d86c7-697b-4fde-b994-f5b062c5ae2e">
    <dct:title xml:lang="el">Σταθμοί Περιβαλλοντικών Μετρήσεων (GeoJSON)</dct:title>
    <dct:title xml:lang="en">Environmental Monitoring Stations (GeoJSON)</dct:title>

    <dct:description xml:lang="el">Αρχείο GeoJSON με σημεία σταθμών και ενδεικτικές τιμές δεικτών.</dct:description>
    <dct:description xml:lang="en">GeoJSON file with station points and sample indicator values.</dct:description>

    <dct:license>
      <dct:LicenseDocument rdf:about="http://publications.europa.eu/resource/authority/licence/CC0"/>
    </dct:license>

    <dcat:accessURL>
      <rdfs:Resource rdf:about="https://demo.opendata.example/"/>
    </dcat:accessURL>

    <dcat:downloadURL>
      <rdfs:Resource rdf:about="https://demo.opendata.example/files/df5d86c7-697b-4fde-b994-f5b062c5ae2e.geojson"/>
    </dcat:downloadURL>

    <dct:rights>
      <dct:RightsStatement rdf:nodeID="N0e761b2d9b8d4b799f79111b112458dc">
        <rdfs:label>Ανοικτή πρόσβαση - ελεύθερη επαναχρησιμοποίηση</rdfs:label>
      </dct:RightsStatement>
    </dct:rights>

    <dcat:mediaType>
      <dct:MediaType rdf:about="https://www.iana.org/assignments/media-types/application/geo+json"/>
    </dcat:mediaType>

    <dct:format>GeoJSON</dct:format>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2025-10-02T12:17:57.136725</dct:issued>
    <dct:modified rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2026-02-11T16:04:35.489455</dct:modified>
    <dcat:byteSize rdf:datatype="http://www.w3.org/2001/XMLSchema#nonNegativeInteger">24576</dcat:byteSize>
    <dcatap:availability rdf:resource="http://publications.europa.eu/resource/authority/planned-availability/AVAILABLE"/>

    <dcatap:applicableLegislation>
      <ns1:LegalResource rdf:about="https://eur-lex.europa.eu/EL/legal-content/summary/open-data-and-the-reuse-of-public-sector-information.html"/>
    </dcatap:applicableLegislation>
  </dcat:Distribution>

  <vcard:Kind rdf:about="https://demo.opendata.example/uri">
    <vcard:fn>Σημείο Επικοινωνίας Ανοικτών Δεδομένων</vcard:fn>
    <vcard:hasEmail rdf:resource="mailto:support@opendata.example"/>
    <vcard:hasURL rdf:resource="https://demo.opendata.example/contact"/>
  </vcard:Kind>

  <dct:RightsStatement rdf:about="http://publications.europa.eu/resource/authority/access-right/PUBLIC"/>
  <ns1:LegalResource rdf:about="https://demo.opendata.example/legal/open-data"/>
  <foaf:Document rdf:about="https://demo.opendata.example/dataset/preview/03237f58-c11b-4be4-9f3b-311432bf7564"/>
  <dct:Frequency rdf:about="http://publications.europa.eu/resource/authority/frequency/NOT_PLANNED"/>

</rdf:RDF>

```


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