This attribute identifies the type of objects contained under the selected base object instances that are to be included in the returned inventory file. The requesting OS always have to provide at least one object. The base object itself may also be included.

For each included object type, one needs to indicate whether
a. just the name,
b. all the associated attributes (including the name), or 
c. the associated attributes and relationship pointers
are to be returned for each instance.

The includedObjectTypes need to be picked such that each selected base class has a single (connected) subtree below it.

The following abbreviations are used for the object type names:
MD - management domain
ME - managed element
EH - equipment holder
EQ - equipment
PTP - physical termination point
FTP - floating termination point
CTP - connection termination point
TPPool - termination point pool
EPGP - equipment protection group
PGP - protection group
SNC - subnetwork connection
RT - route
CC - cross connection
MLSN - multi layer subnetwork
TL - topological link
OS - operations system
TMD - transmission descriptor

Readable by Requesting OS? No
Writeable by Requesting OS? Yes
Invariant? Yes
