With a newly installed agent and Pandora FMS 7.0 enterprise, the inventory plugin is enabled in the agent, and with the inventory server up, the inventory data is not recorded (the SI data is in the XML, and the rest of the XML data is recorded).
For the inventory to work properly we have to make sure that, in the server configuration file /etc/pandora/pandora_server.conf we have enabled the line inventoryserver 1.