multiple records in one NDEF message on one NFC tag

multiple records in one NDEF message on one NFC tag

How many records can NDEF message encapsulate? (for different NFC tag
types - 1,2,3,4?)
And in general ...do I understand it right? :
I can have one NFC message, which is basically an array(of what capacity?)
of NFC records. Each NFC record has its own MIME-type, which facilitates
application recognition
<data android:mimeType="specific application MIME-type goes here"/>
so I can launch different applications even if I use just one tag.