Section 18.104.22.168.1, pg 144
page 144 lines 5-10 say:
A vendor-specific augmentation string, which
provides additional information about the contents
of this index. If provided, the string begins
with a 4-character vendor ID. The remainder of the string
is meant to be read by a cooperating consumer, and its
contents and interpretation are not specified here.
The string is padded with null characters to a multiple
of four bytes in length.
In all cases the document refers to null-terminated strings
and should do so here too to avoid ambiguity.
Replace "the string is padded"
"the null-terminated string is padded"