well–documented
/ˌwɛlˈdɑːkjəˌmɛntəd/
adjective
/ˌwɛlˈdɑːkjəˌmɛntəd/
adjective
Britannica Dictionary definition of WELL–DOCUMENTED
[more well–documented; most well–documented]
—
used to describe something that is known about or known to be true because there are many documents that describe it, prove it, etc.