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]].

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 Royal Family

Example: Scholary communication

Sync Institutions

smwsync -u -t cr --topic EventSeries -p desc title home --progress

How SMWSync works

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

Self describing Properties

MetaModel, SiDIF, LinkML

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

FamilyContext SiDIF is in legacy SiDIF triple format.

pyMetaModel mm_cmd command line tool will generate LinkML yaml markup and other target formats. LinkML can then generate even form format see:

pyMetaModel family example files

Mapping SMW Properties to Wikidata properties

Todo

Command Line Tool

Links

Questions / Discussion