No, the Muwatta is not merely a book of hadith. It is a formulation of law derived from both hadith and other sources. It merely contains a lot of hadith The attahiyat is definitely mentioned in there, it contains the supplication read by Aisha ra and also that of Umar ibn al Khattab ra, if I remember correctly.
NO, why do people keep repeating this half-understanding? It has ahadith but more importantly it has fiqh. It is a formulation of law. The Imam's intention in compiling it was not to present a book of ahadith.
No, the Muwatta is not merely a book of hadith. It is a formulation of law derived from both hadith and other sources. It merely contains a lot of hadith
Well I know the Muwatta isn't strictly speaking a book of hadith, but it's in there, isn't it?