s1) If I select the "OPM" button in addition to the "node", "edge", "+", and "ontology" button in the Edit Triples Panel, I get the Edit OPM dialog. I have Entities, Structural Links, and Procedural Links. Entities include, from top to bottom, Objects which are a thing that can exist for some time, States, which are a situation which an object can be, and Processes, which are a thing that transforms an object. Structural links, or persistent relations between objects, include both fundamental and general links. Fundamental links are triangle shaped. General links are arrow shaped. Descriptions come from a tutorial given by Dov Dori at ER-2003 in Chicago. From top to bottom, the shaded triangle is the aggregation-participation link which is "a structural relation between a whole and its parts", the shaded triangle within a triangle is the exhibition-characterization link which is "a structural relation between a thing and its features", the unshaded triangle is the generalization-specialization link which is a "structural relation between a thing and its features" (i.e. is-a relation), and the triangle with a shaded circle is the classification-instantiation link which is "a structural relation between a thing and its instances". General links include, from top to bottom, the one directional arrow which is the unidirectional tagged structural relation which is a structural link "whose semantics is expressed through its tag" (or lack of), and an arrow with two ends called the bidirectional tagged structural relation which is a relation with zero to two tags "whose semantics is expressed through its tag". The aggregation-participation link and structural link can have participation constraints, which seem to specify numbers of possible objects in a relation. Procedural links are links between an object and the process that transforms it or the state of that object. Procedural links include from top to bottom then left to right, enabling links, which link objects that enable a process, but are not transformed by it, and others as defined. Enabling links include the shaded lollipop figure which is the agent link that "links a human or group of humans that trigger a process or participate in it", the unshaded lollipop figure which is the instrument that links to a non-human object the process requires to occur or execute. The unidirectional unshaded arrow is the "result/consumption/input/output link". The unidirection unshaded arrow is the effect link. The lollipop shaped link with an e inside it, and the unshaded arrow link with an e above it are event links. The lollipop link with an e inside of it is a condition link. The cross shaped link is an exception link. The lightining bolt shaped arrow is an invocation link. To the right of the OPM panels is the panel for editing triples that exists even without OPM selected. Ideally, the OPM editing should function in the same way as directional graph editing with specific function tailored to OPM. References Include: Dov Dori, Object-Process Methodology and Its Application to the Visual Semantic Web, Pre-Conference Tutorial PT1 ER-2003, Chicago, October 12, 2003, http://www.er.byu.edu/er2003/slides/ER2003PT1Dori.pdf