4.10 Decimal-Format Declaration

[1]
"A decimal-format declaration defines statically known decimal formats,"
    It would be more consistent to say something like:
    "A decimal-format declaration defines a decimal format,"
    or
    "A decimal-format declaration adds a decimal format to the statically
    known decimal formats,"
  
[2]
"It is a static error for a query prolog to contain two decimal formats
with the same name, or to contain two default decimal formats.
[err:XQST0111]."
    A query prolog doesn't 'contain' decimal formats.
    You can say either that:
        it contains decimal-format declarations,
    or that
        it declares/defines decimal formats.

    Also, the "[err:XQST0111]" shouldn't be a separate sentence.

[3]
"It is a static error for a decimal-format to specify..."
    After "decimal-format", insert "declaration".

[4]
"It is a static error if [...] the properties [...] do not each have
distinct values."
    Delete "each".