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Only the listed keys or namespaces (:n) are compared. The optional letter after the colon is used to force the type in the comparison: li->integer, d->float, s->string, n->namespace. See -a option. Incompatible with -H option.
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Where clause. Messages are processed only if they match all the key/value constraints. A valid constraint is of type key=value or key!=value. For each key a string (key:s) or , a double (key:d) or a long an integer (key:li) type can be specified. Default type is string.
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