- Linking in hypertext” is one-way, but approaches to make linking two-way (e.g., backlinks in wikis) emerged rather early on.
- It depends on what kind of information you put on the link, but if you put information that “Record A is related to Record B”, it is natural to consider it bidirectional.
- Linkage by “common key phrase occurrence” may involve two or more records
- Unlike directed graphs, which consider edges to be ordered pairs, hypergraphs, which consider them to be sets with more than two elements, match better.
relevance - The Problem of Too Large Links - Not one way, but both ways. - Structuring information with links - Search to Link - Link Creation Support
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