obsolete physical extraction process true removing a fish from the ocean with a net removing dna from cells Considered acquisition in OBI, but that is about taking possession. Physical extraction may involve taking pocession, but it may also just involve extraction of something that is already posessed (e.g. of dna from cells). picking leaves from a plant A process that involves removing a material entity from its original site to another site. Biocode Commons Ontology Hackathon Obsolete Class to be replaced with external ontology term