# DB2
Through the IBM DB2 (opens new window) connector, Ontop is able to construct VKGs on DB2 databases.
# Limitations & Exceptions
- SPARQL UUID and hash functions are not supported for DB2.
- Nested data types and the flatten lens are not supported for DB2
# Database Connection
The following shows the content of a sample .properties file that can be used to connect Ontop to DB2:
jdbc.url = jdbc:db2://localhost:50000/defaultdatabase
jdbc.user = user
jdbc.password = password
jdbc.driver = com.ibm.db2.jcc.DB2Driver
# Nested Type Support
Nested data types and the flatten lens are not supported for DB2.
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