What are you looking for when you wish to inventorise the "characteristics of the archaeological and paleontological heritage?" Are you trying to classify sites/place or are trying to classify constituent components (artefacts/single fossils)?
I try to classify and presenting the characteristic of the archéological and the paleontological sites (age, year of discovery, paleontological interest, geological interest, anthropological interest, vulnerability, preservation and valorisation...). Which i need an model and adapting to my sites.
I have a guide "VadMecum" for the geological heritage, but i need more which i need to adapt to these sites.
I hope that it is clear which i need. I still in your disposition for any clarifications.