Orders of overlap
- 0. Simple hierarchy / no overlap
- Including where there is “concurrent markup” in markup
but no overlap in the model available for processing
- For example, any XML document
- 1. Multiple concurrent hierarchies (MCH)
- Reference structures such as volumes and pages
- Paragraphs and other rhetorical structures
- Stanzas, lines and prosodic structures
- Grammatical and dialogical structures (discourses, sentences, phrases)
- 2. Arbitrary overlap
- i.e. “self-overlap” or “mixing”
- Annotated spans
- Segments identified for keywording or indexing