Tabular Data

Tabular Data [OSW7d3292e5104f45b1be4fc23901fae4fa]
ID	OSW7d3292e5104f45b1be4fc23901fae4fa
UUID	7d3292e5-104f-45b1-be4f-c23901fae4fa
Label	Tabular Data
Machine compatible name	TabularData
Ontology equivalents
Statements (outgoing)
Statements (incoming)
Keywords

Description

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Item
Type(s)/Category(s)	Tutorial

CreativeWork

Article

Tutorial
Prerequisites (required)	JSON-LD Tutorial
Prerequisites (optional)
Follow-up (recommended)

View as slide show

Tabular Data: JSON-Representation

Table

id	name	number
row1	test1	1e12
row2	test2	2
row3	test3	3

JSON - id as key

{
  "content": {
   "row1": {"id": "row1", "name": "test1", "number": "1e12"},
   "row2": {"id": "row2", "name": "test2", "number": 2},
   "row3": {"id": "row3", "name": "test3", "number": 3}
}
}

JSON - index as key

{
  "content": [
   {"id": "row1", "name": "test1", "number": "1e12"},
   {"id": "row2", "name": "test2", "number": 2},
   {"id": "row3", "name": "test3", "number": 3}
]
}

Tabular Data: JSON-LD Mapping

• map each column to a term
• set a default language
• misuse language tag as unit tag - not recommended

JSON - id as key with context

{
  "@context": {
    "test": "http://test.voc/",
    "name": {"@id": "test:name", "@language": "en"},
    "number": {"@id": "test:number", "@language": "Volt"},
    "content": {"@container": "@index", "@id": "test:hasRow", "@index": "test:HasId"}
  },
  "content": {
   "row1": {"id": "row1", "name": "test1", "number": "1e12"},
   "row2": {"id": "row2", "name": "test2", "number": 2},
   "row3": {"id": "row3", "name": "test3", "number": 3}
}
}

Mapping

Subject	Predicate	Object	Language
_:b0	http://test.voc/hasRow	_:b1
_:b0	http://test.voc/hasRow	_:b2
_:b0	http://test.voc/hasRow	_:b3
_:b1	http://test.voc/HasId	row1
_:b1	http://test.voc/name	test1	en
_:b1	http://test.voc/number	1e12	volt
_:b2	http://test.voc/HasId	row2
_:b2	http://test.voc/name	test2	en
_:b2	http://test.voc/number	2
_:b3	http://test.voc/HasId	row3
_:b3	http://test.voc/name	test3	en
_:b3	http://test.voc/number	3

Tabular Data: JSON-LD Mapping

• map each column to a term
• set a default language
• misuse language tag as unit tag - not recommended

JSON - index as key with context

{
  "@context": {
    "test": "http://test.voc/",
    "id": "test:hasId",
    "name": {"@id": "test:name", "@language": "en"},
    "number": {"@id": "test:number", "@language": "Volt"},
    "content": {"@container": "@index", "@id": "test:hasRow", "@index": "test:HasId"}
  },
  "content": [
   {"id": "row1", "name": "test1", "number": "1e12"},
   {"id": "row2", "name": "test2", "number": 2},
   {"id": "row3", "name": "test3", "number": 3}
]
}

Mapping

Subject	Predicate	Object	Language
_:b0	http://test.voc/hasRow	_:b1
_:b0	http://test.voc/hasRow	_:b2
_:b0	http://test.voc/hasRow	_:b3
_:b1	http://test.voc/hasId	row1
_:b1	http://test.voc/name	test1	en
_:b1	http://test.voc/number	1e12	volt
_:b2	http://test.voc/hasId	row2
_:b2	http://test.voc/name	test2	en
_:b2	http://test.voc/number	2
_:b3	http://test.voc/hasId	row3
_:b3	http://test.voc/name	test3	en
_:b3	http://test.voc/number	3

Tabular Data: JSON-LD Mapping

• alternative mapping with named nodes

JSON - index as key with context

{
  "@context": {
    "test": "http://test.voc/",
    "id": {"@id": "@id",  "@context": {"@base": "http://test.voc/"}},
    "name": {"@id": "test:name", "@language": "en"},
    "number": {"@id": "test:number", "@language": "Volt"},
    "content": {"@container": "@index", "@id": "test:hasRow", "@index": "test:HasId", "@context": {"@base": "http://test.voc/"}}
  },
  "@id": "test:myTable",
  "content": [
   {"id": "row1", "name": "test1", "number": "1e12"},
   {"id": "row2", "name": "test2", "number": 2},
   {"id": "row3", "name": "test3", "number": 3}
]
}

Mapping

Subject	Predicate	Object	Language
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row1
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row2
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row3
http://test.voc/row1	http://test.voc/name	test1	en
http://test.voc/row1	http://test.voc/number	1e12	volt
http://test.voc/row2	http://test.voc/name	test2	en
http://test.voc/row2	http://test.voc/number	2
http://test.voc/row3	http://test.voc/name	test3	en
http://test.voc/row3	http://test.voc/number	3

Tabular Data: JSON-LD Mapping

JSON - index as key with context, header meta data

{
  "@context": {
    "test": "http://test.voc/",
    "id": {"@id": "@id",  "@context": {"@base": "http://test.voc/"}},
    "name": {"@id": "test:name", "@language": "en"},
    "number": {"@id": "test:number"},
    "property": {"@id": "test:hasProperty", "@type": "@id"},
    "unit": {"@id": "test:hasUnit", "@type": "@id"},
    "header": {"@container": "@index", "@id": "test:hasColumn", "@index": "test:HasId", "@context": {"@base": "http://test.voc/"}},
    "content": {"@container": "@index", "@id": "test:hasRow", "@index": "test:HasId", "@context": {"@base": "http://test.voc/"}}
  },
  "@id": "test:myTable",
    "header": [
      {"id": "column1", "name": "id", "property": "test:hasId"},
      {"id": "column2", "name": "name", "property": "test:hasName"},
      {"id": "column3", "name": "number", "property": "test:hasNumber", "unit": "test:volt"}
  ],
  "content": [
   {"id": "row1", "name": "test1", "number": "1e12"},
   {"id": "row2", "name": "test2", "number": 2},
   {"id": "row3", "name": "test3", "number": 3}
]
}

Mapping

Subject	Predicate	Object
http://test.voc/column1	http://test.voc/hasProperty	http://test.voc/hasId
http://test.voc/column1	http://test.voc/name	id
http://test.voc/column2	http://test.voc/hasProperty	http://test.voc/hasName
http://test.voc/column2	http://test.voc/name	name
http://test.voc/column3	http://test.voc/hasProperty	http://test.voc/hasNumber
http://test.voc/column3	http://test.voc/hasUnit	http://test.voc/volt
http://test.voc/column3	http://test.voc/name	number
http://test.voc/myTable	http://test.voc/hasColumn	http://test.voc/column1
http://test.voc/myTable	http://test.voc/hasColumn	http://test.voc/column2
http://test.voc/myTable	http://test.voc/hasColumn	http://test.voc/column3
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row1
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row2
http://test.voc/myTable	http://test.voc/hasRow	http://test.voc/row3
http://test.voc/row1	http://test.voc/name	test1
http://test.voc/row1	http://test.voc/number	1e12
http://test.voc/row2	http://test.voc/name	test2
http://test.voc/row2	http://test.voc/number	2
http://test.voc/row3	http://test.voc/name	test3
http://test.voc/row3	http://test.voc/number	3

Data Tables Schema

http://dataprotocols.org/json-table-schema/

Tutorial Graph

Graph graph-01

Graph

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jsondata

type	"Category:OSW494f660e6a714a1a9681c517bbb975da"
uuid	"7d3292e5-104f-45b1-be4f-c23901fae4fa"
name	"TabularData"
label	text "Tabular Data" lang "en" text "Tabellarische Daten" lang "de"
required_predecessor	"Item:OSW911488771ea449a6a34051f8213d7f2f"