Conference paper Open Access

SPARQL-LD: A SPARQL Extension for Fetching and Querying Linked Data

Fafalios, Pavlos; Tzitzikas, Yannis


JSON Export

{
  "files": [
    {
      "links": {
        "self": "https://zenodo.org/api/files/6e454e40-d71f-4015-bb71-803674eb7272/fafalios_2015_sparql-ld.pdf"
      }, 
      "checksum": "md5:e24c73ea63b04668153f8465a5c7fe68", 
      "bucket": "6e454e40-d71f-4015-bb71-803674eb7272", 
      "key": "fafalios_2015_sparql-ld.pdf", 
      "type": "pdf", 
      "size": 80434
    }
  ], 
  "owners": [
    2217
  ], 
  "doi": "10.5281/zenodo.34621", 
  "stats": {
    "version_unique_downloads": 36.0, 
    "unique_views": 97.0, 
    "views": 98.0, 
    "version_views": 98.0, 
    "unique_downloads": 36.0, 
    "version_unique_views": 97.0, 
    "volume": 2976058.0, 
    "version_downloads": 37.0, 
    "downloads": 37.0, 
    "version_volume": 2976058.0
  }, 
  "links": {
    "doi": "https://doi.org/10.5281/zenodo.34621", 
    "latest_html": "https://zenodo.org/record/34621", 
    "bucket": "https://zenodo.org/api/files/6e454e40-d71f-4015-bb71-803674eb7272", 
    "badge": "https://zenodo.org/badge/doi/10.5281/zenodo.34621.svg", 
    "html": "https://zenodo.org/record/34621", 
    "latest": "https://zenodo.org/api/records/34621"
  }, 
  "created": "2016-02-16T09:01:34+00:00", 
  "updated": "2020-01-20T13:10:30.667317+00:00", 
  "conceptrecid": "619609", 
  "revision": 11, 
  "id": 34621, 
  "metadata": {
    "access_right_category": "success", 
    "doi": "10.5281/zenodo.34621", 
    "description": "<p>SPARQL is a standard query language for retrieving and manipulating RDF data.&nbsp;However, the majority of SPARQL implementations require the data to be available in advance, i.e., to exist in main memory or in a RDF repository (accessible through a SPARQL endpoint). Nonetheless, Linked Data exists in the Web in various forms; even an HTML Web page can contain RDF data through RDFa, or RDF data may be dynamically created by a Web Service. In this paper, we propose and demonstrate an extension of SPARQL 1.1, called SPARQL-LD, that allows to directly and flexibly exploit this wealth of data. SPARQL-LD allows to fetch, query and integrate in the same SPARQL query: i) data coming from online RDF or JSON-LD files, ii) data coming from dereferenceable URIs, iii) data embedded in Web pages as RDFa, iv) data that is dynamically created by Web Services, and v) data coming by querying other endpoints. A distinctive characteristic of this extension is that it enables to fetch and query even data in datasets returned by a portion of the query, i.e. discovered at query-execution time.&nbsp;</p>", 
    "license": {
      "id": "CC-BY-4.0"
    }, 
    "title": "SPARQL-LD: A SPARQL Extension for Fetching and Querying Linked Data", 
    "relations": {
      "version": [
        {
          "count": 1, 
          "index": 0, 
          "parent": {
            "pid_type": "recid", 
            "pid_value": "619609"
          }, 
          "is_last": true, 
          "last_child": {
            "pid_type": "recid", 
            "pid_value": "34621"
          }
        }
      ]
    }, 
    "keywords": [
      "SPARQL", 
      "Linked Data", 
      "Web of Data"
    ], 
    "publication_date": "2015-12-03", 
    "creators": [
      {
        "affiliation": "Institute of Computer Science, FORTH-ICS and Computer Science Department, University of Crete, Greece", 
        "name": "Fafalios, Pavlos"
      }, 
      {
        "affiliation": "Institute of Computer Science, FORTH-ICS and Computer Science Department, University of Crete, Greece", 
        "name": "Tzitzikas, Yannis"
      }
    ], 
    "meeting": {
      "acronym": "ISWC'15", 
      "dates": "11-15 October 2015", 
      "place": "Bethlehem, Pennsylvania, USA", 
      "title": "14th International Semantic Web Conference - Demonstrations Track"
    }, 
    "access_right": "open", 
    "resource_type": {
      "subtype": "conferencepaper", 
      "type": "publication", 
      "title": "Conference paper"
    }
  }
}
98
37
views
downloads
All versions This version
Views 9898
Downloads 3737
Data volume 3.0 MB3.0 MB
Unique views 9797
Unique downloads 3636

Share

Cite as