2.2.4.2.1.4 Variable Count Tokens(xx00xxxx)

This class of token definition is followed by a count of the number of fields that follow the token. Each field length is dependent on the token type. The total length of the token can be determined only by walking the fields. A variable count token always has its third and fourth bits set to 0.

0

1

2

3

4

5

6

7

x

x

0

0

x

x

x

x

In the diagram above, x denotes a bit position that can contain the bit value 0 or 1.

Currently there are two variable count tokens. COLMETADATA and ALTMETADATA both use a 2-byte count.

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