Item:OSW7113f5cf921a4c82ad1872afeff9d01d

Transcend wikitext to store and edit structured & linked data [OSW7113f5cf921a4c82ad1872afeff9d01d]
ID	OSW7113f5cf921a4c82ad1872afeff9d01d
UUID	7113f5cf-921a-4c82-ad18-72afeff9d01d
Label	Transcend wikitext to store and edit structured & linked data
Machine compatible name	TranscendWikitextToStoreAndEditStructuredLinkedData
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Follow-up (recommended)	JSON Tutorial

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Conventional approach: Using a single slot (main) and multiple pages

You can have content-model = wikitext for pages, templates, forms, etc.

Some unstructured text
{{MyTemplate
|param1=value1
}}
{{#aparserfunction:}}

or content-model = json without any specific rendering

{
    "param1": "value1"
}

Problems:

• you can have rendered page content or structured page content
• content is distributed over multiple pages

Conventional approach: Using a single slot (main) and a single page

Store structured data within nested templates in wikitext

Some unstructured text
{{MyDataTemplate
  |text=some text
  |number=123
  |array=1;two;3.0
  |nested={{MySubDataTemplate
    |param=value
  }}
  watch out, i am a nested string
  {{MySubDataTemplate
    |param=value2
  }}
}}
{{#aparserfunction:}}

json-equivalent

{
    "@type": "MyDataTemplate",
    "text": "some text",
    "number": 123,
    "array": [1,"two",3.0],
    "nested": [{
        "@type": "MySubDataTemplate",
        "param": "value"
    },
    "watch out, i am a nested string",
    {
        "@type": "MySubDataTemplate",
        "param": "value"
    }]
}

Problems

• Extensions like SMW only cover reading mappend template params as json
• Extensions like PageForms require a individual form to edit the data
• => In general you need a template-parser (e. g. wikitext to json) in your client software at least to edit/write data in general
• => Doing so requires guessing of data types and correct interpretation of arrays

Luckily we have Multi-Content-Revisions (MCR)

Lets add a jsondata slot

Slot	Content Model
main	wikitext
jsondata	json

main

Some unstructured text

{{#aparserfunction:}}

jsondata

{
    "@type": "MyDataTemplate",
    "text": "some text",
    "number": 123,
    "array": [1,"two",3.0]
}

Would be nice to validate the json data

Lets add a jsonschema slot for Category pages

Slot	Content Model
main	wikitext
jsondata	json
jsonschema	json

Category:MyCategory jsonschema

{
    "type": "object",
    "properties": {
        "text": { "type": "string" },
        "number": { "type": "number" },
        "array": { "type": "array" }
    }
}

Item:MyInstance jsondata

{
    "@type": "MyDataTemplate",
    "text": "some text",
    "number": 123,
    "array": [1,"two",3.0]
}

If we have a jsonschema, we get the editor & validator for free

https://github.com/json-editor/json-editor

Category:MyCategory jsonschema

{
    "type": "object",
    "title": "My Form",
    "title*": {"de": "Mein Formular"} ,
    "properties": {
        "color": { 
            "type": "string", 
            "format": "color" 
        },
        "number": { 
            "type": "number", 
            "description": "not a string!"
        }
    }
}

Item:MyInstance jsondata

{
    "color": "#ff0000",
    "number": "123"
}

Classes, Instances, Inheritance?

Lets add a jsonschema slot for Category pages

Slot	Content Model
main	wikitext
jsondata	json
jsonschema	json

Category:MyCategory jsonschema

{
    "type": "object",
    "properties": {
        "text": { "type": "string" },
        "number": { "type": "number" },
        "array": { "type": "array" }
    }
}

Category:MySubCategory jsonschema

{
    "type": "object",
    "allOf": "/wiki/Category:MyCategory?action=raw&slot=jsonschema",
    "properties": {
        "additional_property": { "type": "string" }
    }
}

Context and Semantic MediaWiki

Lets add a json-ld context within the jsonschema slot for Category pages

Slot	Content Model
main	wikitext
jsondata	json
jsonschema	json

Category:MySubCategory jsonschema

{
    "@context": [
        "/wiki/Category:MyCategory?action=raw&slot=jsonschema",
       {
            "schema": "https://schema.org/",
            "Property": "<my.domain>/id/",
            "image": "schema:image",
            "image*": "Property:HasProperty"
       }
    ],
    "allOf": "/wiki/Category:MyCategory?action=raw&slot=jsonschema",
    "properties": {
        "additional_property": { "type": "string" }
    }
}

Item:MyInstance jsondata

=> [[HasProperty:{{{additional_property|}}}]]

Interconnection with the wikiparser

Additional slots rendered by the wiki parser

Slot	Content Model	Description
main	wikitext	default content slot, rendered between the page header and footer
jsondata	json	structured data
jsonschema	json	stored within a category (=class) page, defining the schema for the jsondata slot of any category member (instance)
header_template	wikitext	stored within a category (=class) page, renders the page header of any category member (instance)
footer_template	wikitext	stored within a category (=class) page, renders the page footer of any category member (instance)
header	wikitext	renders the page header via {{#invoke: Entity|header}}*
footer	wikitext	renders the page footer via {{#invoke: Entity|footer}}*

Footer / Header template

Entries of my_list:
{{{my_list|}}}

Property-specific templates within the schema

{
    "type": "object",
    "properties": {
        "my_list": { 
            "type": "array", 
            "eval_template": {
                "type": "mustache-wikitext",
                "value": "{{#my_list}} * [[{{{.}}}]] <br> {{/my_list}}"
            }
        }
    }
}

• *Wiki-side feature are implemented in Lua => To be rewritten in PHP
• Why are parser calls needed at all? Currently there seems no options to provide a hook from the core that allows injecting slot-specific content

Further links

• https://github.com/OpenSemanticLab (The software stack behind)
• Google structured data validator: https://search.google.com/test/rich-results/result?id=hbvnEP-_VO0pG-KPPLLkDQ
• Schema PagePackages: https://github.com/orgs/OpenSemanticWorld-Packages/repositories

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jsondata

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