The NOTEQUAL
field specifier (case sensitive) returns documents in which at least one instance of a specified field contains a number that does NOT match the number you specify.
You can optimize the field specifier speed by restricting the field to the
property type.
FieldText=NOTEQUAL{yourNumber}:yourFields
yourNumber

A number. A document returns only if at least one instance of one of yourFields contain a number that is not yourNumber . 
yourFields

One or more fields. A document returns only if it contains at least one of these fields, and if at least one instance of one of these fields does not contain yourNumber . Separate multiple fields with colons (: ). There must be no space before or after a colon. 
FieldText=NOTEQUAL{1234}:ACCOUNT:KONTO
Documents must contain an ACCOUNT
or KONTO
field, and at least one instance of one of these fields must contain a number that is not 1234
.
FieldText=NOTEQUAL{7}:ID
Documents must contain an ID
field, and at least one instance of this field must not contain the number 7 or 7.0.
