Doc-20230203-wa0002. -

: Identifies the file type as a Document (as opposed to VID for video or IMG for image).

: A unique sequence number assigned to that specific file on that date. In this case, it was likely the third document processed that day (starting from 0000). Contextual Usage DOC-20230203-WA0002.

DOC vs DOCX: Main differences and similarities | Adobe Acrobat : Identifies the file type as a Document