Entity map

What a switch calls its parts, and which drawn part each one is.

A switch's operating system names its own components (sfp1, psu0, thermal3). A drawing names its parts by stable id (port-1, psu-1). A listing's entity-map is the declared translation between the two. Pick a device and the page applies its rules to a component dump taken from a running unit, so every name in the dump shows where it lands: on a drawn part, in a region the drawing does not show, or nowhere, which the schema allows.