Import substitution experience in the Interin PROMIS Alpha healthcare information system

Import substitution of database management systems is currently the foremost task facing many information system vendors. In the paper, we consider the experience of migrating the Interin PROMIS HIS from Windows/Oracle technologies to Linux/PostgreSQL based technologies recommended by the Register of Russian Software. The paper also provides an assessment of two approaches to migration of information system modules, namely redesign using the tools of the Interin Alpha PG platform and automatic conversion using in-house tools.