Following the overall harmonisation concept, the description structure of the ITS Core services in this handbook consists of several parts, which are depicted in Figure 6:
Per set of TTI, TM, and F&L services an introduction is available, where decision makers find all basic/general and strategic information bundling content that is common to all TTI respectively TM and F&L services.
The ITS service at a glance gives a very brief overview of the nature of the service.
The section ITS service profile gives an overall explanation of the ITS Core service.
The section Harmonization requirements and advice delivers answers in form of requirements and advice to questions around what is needed for a harmonised deployment of European ITS Core services:
Annex A delivers a collection references to existing deployments (partly or complete conform to this Reference Handbook).
Annex B lists mandatory features required for a harmonized ITS Core service deployment in form of a table named “compliance checklist”.
Annex C gives and explains the concept of the Operating Environments.
 Level of quality criteria are only defined for TTI and F&L services