About: Overlapping markup
In markup languages and the digital humanities, overlap occurs when a document has two or more structures that interact in a non-hierarchical manner.A document with overlapping markup cannot be represented as a tree.This is also known as concurrent markup.Overlap happens, for instance, in poetry, where there may be a metrical structure of feet and lines; a linguistic structure of sentences and quotations; and a physical structure of volumes and pages and editorial annotations.
