I'm following with much interest the recent discussions on data structures and possible new directions for Leo. Sorry in advance if this new post hashes old ground, but it seemed to be somewhat of a different approach (or question).
It would be really cool to better expose the uA's and make them truly useful. However, I see them as merely metadata (like tags in media files). What would also be useful is to describe in some meaningful way the *nature* of a data relationship between elements (objects or 'nodes' in the Leo sense). Looking at the wikipedia article on DAGs <https://en.wikipedia.org/wiki/Directed_acyclic_graph>, I see the directed vectors (arrows), but don't see how those describe what the 'nature' of the relationship is between objects, just a direction (of course, I may be missing something obvious). As an example, consider how MusicBrainz <https://musicbrainz.org/doc/Work> describes advanced relationships (ARs). A music track (like on a CD) may have a relationship with a composition (work) and that relationship is described in a somewhat 'symmetrical' way, such that the given work is 'related' to multiple recordings and the track may be related to multiple compositions (eg. medleys). These relationship 'descriptors' are directional which prevents recursion problems. It seems to me that the only relationship inherent in the Leo data model is one of Parent/Child (and maybe Sibling). I suppose that's what makes it a DAG. Is it possible to describe other arbitrary types of relationships between objects (nodes) that goes beyond simply assigning a uA (tag) to a node. Maybe that uA may also be a relationship 'type' that creates a 'link' between two or more nodes. Maybe this also creates opportunities to create multiple 'views' based on relationship types other than the native Parent/Child. Rob...... -- You received this message because you are subscribed to the Google Groups "leo-editor" group. To unsubscribe from this group and stop receiving emails from it, send an email to leo-editor+unsubscr...@googlegroups.com. To post to this group, send email to leo-editor@googlegroups.com. Visit this group at https://groups.google.com/group/leo-editor. For more options, visit https://groups.google.com/d/optout.
