| http://www.w3.org/ns/prov#value | - The order event record (see FIG. 5), which is being moved around in the event messages of the order report tracking service, such as in the tracking queue, the confirmation queue, error queue, etc. preferably stores: a primary execution key 162 (8 bytes), an asset ID or order number 164 (8 bytes), an execution number 166 (8 bytes), an OES execution ID 168 (32 bytes), the asset exchange symbol 170
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