Thanks for reply! Here is real life example: There are two exchangeable units: a flange board and add-on equipment. There is EEPROM on add-on equipment which stores some parameters of attached add-on in XML format. The add-on is attached to flange board. The firmware running on that board reads EEPROM, extracts XML file and parse it. Two XML-tags are searched for during the parsing. First tag defines begining of configuration parameters and second tag specifies the name of configuration parameters...
Expose data source context to user