The OpenAIRE Guidelines are simple metadata specifications for repositories that need to be OpenAIRE compliant. After complying to the OpenAIRE guidelines, the repository will become the single entry point for researchers that want to deposit FP7 and H2020 publications.
The OpenAIRE guidelines are backward compatible, i.e. the older guidelines versions are still supported. The different versions/compatibility levels are explained here: https://www.openaire.eu/openaire-guidelines-update-for-data-providers.