# 20171011-01

**Summary:** Adds trigger constraints \
**Category:** Bugfix \
**Details:** With this update, SanteDB now enforces the types of relationships between entities. Prior to this trigger, it was possible to relate entities in ways which made no sense (for example, a Place could be a Parent of a Patient). This update creates a validation trigger which is used to verify that the relationship being inserted into the database makes sense from a semantic standpoint. \
**Bug / Issues:** N/A\
**Applies To:** OpenIZ Server, SanteDB Server\
**Impacted Versions:** 0.9.0.5 \
**Status:** Released (October 11, 2017)\
**Impact:** High \
**RDBMS:** PostgreSQL