Is it grammatically correct to say “Noun + という + Noun”?

Or I have to say “Noun + だ + という+ Noun” ?

Or is it a same thing with difference in an informal/formal speech ?
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2019-06-21T01:34:12.087
68963
2019-09-13T14:15:16.810
32181
question
grammar
N+だ+というN or NというN
Both forms exist, but their meanings are quite different.

AというB means something like "the B that is called/referred to as A":

> ATCという会社 ＝ the company called 'ATC'
>
> 青春というもの ＝ the thing referred to as 'youth'
>
> あなたという人 ＝ the person that you are (fairly common expression in Japan)

AだというB is closer "the B that **it** is A", where A can be any sentence
(including sentences ending in a noun):

> 悪いのはお前だという一言 ＝ the comment that you are at fault
>
> ブラジルだというクイズの答え ＝ the quiz answer that it is Brazil
>
> 植物も生き物だという事実 ＝ the fact that plants are living beings, too
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2019-06-23T15:29:17.067
69024
2019-06-24T15:08:04.743
2020-06-17T08:18:27.500
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answer