My scenario is a third party parking management enrollment software which can export an .xml file containing the license plates of valid vehicles. The user wants to import that data into XProtect to automatically create/update a match list in LPR in order to check vehicles to verify if they are valid using the LPR system.
We had the same problem when developing one of our integrations. We couldn’t find any support for the LPR plug-in in the SDK so we ended up connecting to the SQL Server from our plug-in and modify the database tables directly. There should be a series of stored procedures in the Surveillance database beginning with LPR which you can use to add and delete license plates.