The HPE iLO 8 Redfish documentation contains several sections summarized below.
The HPE iLO 8 v1.10 reference documents contain all the needed API information related to the published iLO 8 firmware version, for writing efficient Redfish clients.
iLO 8 firmware version 1.10 is the baseline release documented in this section.
The supplement documents section provides useful technical information with practical examples that should work against all versions of iLO firmware (if not, it provides the exact working firmware version). As an example, the OData query options page explains briefly the concept of OData query options and provides examples that can be used to simplify Redfish client requests and associated response parsing.
Supplement documents are regularly updated. You should check the last update date in the upper left corner of the main pane of each document.