alignment and alignmentUnit are not relevant to character set encodings. Each 
charset encoding specifies the alignment its characters require.  There is a 
section in the DFDL spec called "Mandatory Text Alignment".

Note that there are 1-bit, 3-bit, 4-bit, 5-bit, 6-bit and 7-bit encodings 
supported by Daffodil.
________________________________
From: Costello, Roger L. <[email protected]>
Sent: Monday, April 13, 2020 8:05 AM
To: [email protected] <[email protected]>
Subject: Why is alignment and alignmentUnits required with text data formats?

Hi Folks,

In text data formats doesn't the first character always start at the first byte 
and the second character follows the first character and so forth? If yes, then 
why is alignment and alignmentUnit relevant? Why are they required?

/Roger

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