need to document best practices somewhere (separate namespace, per property?)
unification vs. separation: do we prefer a few very expressive property or many simple ones; do we want to reuse the same property in different context or create separate ones? (e.g. Wikidata:Property proposal/Person#religious rank)
how to properly represent and source birth/death dates/locations and multitudes of transliterations? (e.g. Al-Khwarizmi (Q9038))
how to deal with ontology mismatches between WP and WD
or case where a WP wants a different property value
sourcing
how to deal with unreliably imported statements
need to be flagged ("imported from" might be too much maintenance work)
user interface/API could give a relative view, only displaying/returning reliable/all statements depending on choice of the user
import/synchronization with external data sources
best practices for imports done by bots
full URL, import data
conflicts between bot imports and manual curation
keep imported statements, but mark deprecated?
example scenario: record is imported from external database, statement gets manually approved on wikidata, record is deleted from external database; what to do on next synchronization pass (delete, keep, mark as deleted, flag as needing attention)?
keep full provenance data (research on this has been done in the context of SQL)