2.2.1.3.2 Query Component Details
The query component of the Request-URI MUST be present. The following subsections specify the syntax of the query component for the three functions that are supported by this protocol.
The following ABNF, as defined in [RFC5234], specifies the syntax that the query component MUST adhere to.
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query-component = (query-detection / query-version / query-URL)
The protocol server MUST interpret the value of the query component as case-insensitive.