What is *actually* a *standard part*?
The "1N4007" and "1N4148" part numbers are JEDEC standards, and presumably there is a standard document available from http://www.jedec.org.
After some hunting, this organization claims to be able to supply a print or PDF copy:
https://global.ihs.com/doc_detail.cfm?&amp;input_search_filter=JEDEC&amp;item_s_key=00207654&amp;item_key_date=290303&amp;input_doc_number=1N4001&amp;input_doc_title=&amp;org_code=JEDEC

Most manufacturers parts are defined better by the manufacturer (finish, lead length, marking, packaging) so it is rare that a designer will refer to the original standard rather than the manufacturer's current data sheet.   A requirement for lead-free finish on the wires was NOT part of the old 1N4007 spec, but can be very important nowadays.  So, too, can feed belt packaging versus box-of-loose-parts.