.Ql # ,
followed by a single space, followed by
.Dq Li PROVIDE: ,
.Dq Li PROVIDES: ,
.Dq Li REQUIRE: ,
.Dq Li REQUIRES: ,
.Dq Li BEFORE: ,
or
.Dq Li KEYWORD: .
.Dq Li KEYWORDS: .
No deviation is permitted.
Each dependency line is then followed by a series of conditions,
separated by whitespace.