Hyph: hyphenated compound or part of it
Boolean feature. Is this part of a hyphenated compound? Depending on tokenization, the compound may be one token or be split to several tokens; then the tokens need tags.
Yes: it is part of hyphenated compound
Examples: “anglo-“ in “anglo-saxon”; [cs] “česko-slovenský” (Czecho-Slovak; the second part is a normal adjective, including adjectival morphological paradigm, but the first part is special.)