<figure xmlns="http://www.tei-c.org/ns/1.0"> <graphic url="BRUDER_Daniel_Datenmodelle_zur_digitalen_Texterfassung__Comp-10000201000004BA000002160FBA5023.png" /> </figure> <p xmlns="http://www.tei-c.org/ns/1.0">These interconnections to constrain the combinatorics to specific readings cannot formally be made part of the tree structure itself. To build a tree, any node in the tree must have exactly one parent. A different data model and data structure is necessary to model more than one parent for one node, namely the data model of the graph.</p>