WOLFRAM

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背景

Import 与 Export

参数

选项

范例  
基本范例  
参见
GraphStore`

Turtle (.ttl)

背景

Import 与 Export

  • Import["file.ttl"] imports a Turtle file, returning an RDFStore.
  • Import["file.ttl",elements] imports the specified elements.
  • Export["file.ttl",expr] exports an RDFStore to a Turtle file.

参数

  • General Import elements:
  • "Elements" list of elements and options available in this file
    "Rules"full list of rules for each element and option
    "Options"list of rules for options, properties and settings
  • Data representation elements:
  • "Data"an RDFStore
    "Base"base IRI used to resolve relative IRIs
    "Prefixes"association of prefixes to namespace IRIs

选项

  • Import options:
  • "Base"Automaticbase IRI used to resolve relative IRIs
  • The value of "Base" is only used if the file does not specify a base IRI.
  • "Base" can take the following values:
  • Automaticthe file name of the imported file
    Noneno base IRI
    "iri" or URL["iri"]an IRI
  • Export options:
  • "Base"Noneproduce IRIs relative to this base
    "Prefixes"<||>produce prefixed names using these prefixes
  • A prefixed name has the form pre:local. The corresponding IRI is obtained by joining the namespace IRI associated with the prefix pre with the local part local.
  • "Base" and "Prefixes" can be used to shorten an exported file. These options do not change the meaning of the RDFStore that the file represents.

范例

基本范例  (1)

Wolfram Language code: Needs["GraphStore`"]

Import a recipe in the Turtle format:

Wolfram Language code: recipeGraph = ImportString[" PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX time: <http://www.w3.org/2006/time#> PREFIX fo: <http://purl.org/ontology/fo/> PREFIX ex: <http://example.org/> ex:riceWithMushrooms a ex:recipe ; rdfs:label \"rice with mushrooms\" ; fo:ingredients (ex:rice ex:mushroom ex:oil ex:water ex:salt ex:pepper) ; ex:step ex:heatOil , ex:fryMushroom , ex:cookRice , ex:mixRiceAndMushroom . ex:cookRice time:minutes 10 . ex:mixRiceAndMushroom time:after ex:fryMushroom , ex:cookRice . ex:fryMushroom time:after ex:heatOil ; time:minutes 7 . ", "Turtle"]

List the ingredients:

Wolfram Language code: rdf[s_] := URL["http://www.w3.org/1999/02/22-rdf-syntax-ns#" <> s]; fo[s_] := URL["http://purl.org/ontology/fo/" <> s]; ex[s_] := URL["http://example.org/" <> s];
Wolfram Language code: recipeGraph//SPARQLSelect[SPARQLPropertyPath[ex["riceWithMushrooms"], {fo["ingredients"], rdf["rest"]..., rdf["first"]}, SPARQLVariable["ingredient"]]]