Reviewing the content that appears in two places in the document:
For example the content in the following locations are the similar/the same:
https://onap.readthedocs.io/en/latest/submodules/vnfrqts/requirements.git/docs/Chapter4/Modularity.html#onap-heat-orchestration-templates-overview
&&
https://onap.readthedocs.io/en/latest/submodules/vnfrqts/requirements.git/docs/Chapter5/Heat.html#onap-vnf-modularity