How can i Initiate a Joget process from an asp.net archiving system & send extra parameters during the API call

Dear All

One of my clients have an archiving system based on asp.net , the system in general allow to scan an image , image processing g it and finally save it to the database.

So i need to integrate the archiving system with the Joget workflow, so that after archiving the document to initiate the Joget workflow . I read about the web/json/workflow/process/start/(*:processDefId) APi that allow to start a process instant , but this raise two question in my mind:-

1. how will the archiving system knows the Joget processDefId to send it , as part of the API call; should this for example be manually defined ?.
2. how can i access the archived document inside the Joget workflow; should i for example send the archived document URL during the API call , IF yes , how can i do this since i can only send the "(*:processDefId) " when calling the start process API.

BR