Is the adjective インディペンデント actually used as an adjective?


I saw a movie labeled

> インディペンデント作品

The adjective インディペンデント does not end in _i_ and is followed by neither _na_
nor _no_ here. Is this meant as a strange compound noun ( _katakana_ + _kanji_
)? Or is this a partial translation of 'independent film', keeping the English
grammar?




I think in your example, インディペンダント is used as a noun indeed, a movie genre for
example: "Independent".  
You can compare with expressions such as ホラー映画.

The confusing part may be that there are also adjectives made from these same
words, but their usage and meaning slightly differs: インディペンデントな働き方,
ホラーなトイレットペーパー (?!).

