EMWConTalk2023-04

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Wolfgang Fahl

WolfgangFahl.png
  • Computer Scientist
  • Expert
  • Trainer for Software Architecture and Requirements Engineering
  • PhD Candidate at RWTH Aachen i5

BITPlan GmbH

BITPlan

  • Inception: 1999


  • Focus on Software-Engineering 

Training, Consulting, Projects …
  • 

Switch from Lotus Notes to 
Semantic Mediawiki in 2013


  • ProfiWiki since 2015

Agenda

  • Wikidata-logo-en.svg Wikidata
  • 20210702 Semantic MediaWiki logo with wordmark.png
  • Octicons-sync.svg Synchronization

SMW and Wikidata storage

  • Both systems use triples: subject, predicate and object
  • It's a girl revisited:
    It's a girl!
The princess of cambridge was born on [[is born::2015-05-03]] 
Her rank inline to the throne is [[throne rank is::4]].
Her mother is [[mother is::Duchess Kate]].

SMW as a database?

Compare to a relational database:

  • Tables are dynamically created via ask-queries e.g.List of Persons
  • A page corresponds to a row in a table

SMW relational operations

Row and Column definition operations

Caption text
Operation Manually Via Api Via Wikipush
Create create page and use markup to set property edit wikipush, wikiupload, wikirestore
Read visit link of page read html or markup {Done}} wikibackup, wikipush, wikiedit
Update modify page via edit edit wikiedit, wikirestore, wikipush
Delete delete page delete {Done}} wikinuke

Column value operations

Caption text
Operation Manually Via Api Via Wikipush
Create add property value manually on a page ->
Read use ask queries to retrieve property values edit wikiquery
Update modify property value manually on a page ->
Delete remove property value manually on a page

Modifying a Single triple

wikiedit -t family --template Person --property label --value "Alexandra of Denmark" -p Alexandra_of_Denmark 
editing 1 pages in family (dry run)
1/1 (100.00%): editing Alexandra_of_Denmark ...👍 |childOf=F74
 |parentOf=F2
 |spouse=Q20875
+|label=Alexandra of Denmark
 }}
 [[Category:frontend]]
wikiedit -t family --template Person --property label --value "Alexandra of Denmark" -p Alexandra_of_Denmark -f
editing 1 pages in family (forced)
1/1 (100.00%): editing Alexandra_of_Denmark ...✅

Example Usecases

  • Royal Family
  • Scholary communication

Example: Scholary communication

0x1a095a5a.png

How SMWSync works

  • Self describing Properties
  • Mapping SMW Properties to Wikidata properties
  • Command Line Tool

Self describing Properties

MetaModel, SiDIF, LinkML

YpgenScreenShotFamilyContext2023-04-19.png

ypgen --wikiId family --context FamilyContext --serve --host localhost

FamilyContext SiDIF is in legacy SiDIF triple format.

Mapping SMW Properties to Wikidata properties

Todo

Command Line Tool

Links

Questions / Discussion

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