EMWConTalk2023-04

view EMWConTalk2023-04 as slides

Wolfgang Fahl

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

BITPlan GmbH

• Inception: 1999


• Focus on Software-Engineering 

Training, Consulting, Projects …
• 

Switch from Lotus Notes to 
Semantic Mediawiki in 2013


• ProfiWiki since 2015

Agenda

• Wikidata
• 
• 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]].

• http://royal-family.bitplan.com/index.php/Princess_Charlotte_of_Cambridge
• http://family.bitplan.com/index.php/Princess_Charlotte_of_Cambridge

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

• py-3rdparty-mediawiki issue #91 wikiedit allow to modify single parameter of a macro WikiSon see WikiSon
• http://family.bitplan.com/index.php/Alexandra_of_Denmark

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

• https://cr.bitplan.com
• https://ceur-ws.bitplan.com/index.php/List_of_Institutions

How SMWSync works

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

Self describing Properties

• 2013: Pierr Racine
• 2015: BITPlan ProfiWiki
• Person Label (to be synced with wikidata)

Links

• https://wiki.bitplan.com/index.php/PySMWSync
• https://wiki.bitplan.com/index.php/PyMetaModel
• https://wiki.bitplan.com/index.php/Py-yprinciple-gen

Questions / Discussion