This chapter describes the use of elements in MEI for linking and referencing. This includes the elements, models, and attributes that are part of the `MEI.ptrref` module. This module contains declarations, techniques and approaches to establish references within a single MEI document, or to link out from one MEI document to another or to other external sources. This chapter also addresses possibilities to link into an MEI document from external sources which makes MEI highly interoperable and serviceable in the context of Linked (Open) Data approaches.
An element is a ‘link’ when it has an attribute whose value is a reference to the ID of one or more other elements (cross-reference). These link elements indicate an association between themselves (or one of their ancestors) and one or more other entities, either inside the same document or elsewhere. An association between two elements in the same document is said to be an ‘internal’ link, while an association that involves an entity outside the current document is called an ‘external’ link. However, either of the elements discussed in the following section can be used for either purpose.
This section describes techniques and approaches to establish references within a single MEI document, or to link out from one MEI document to another or to other external sources.
The linkAlign module has been deprecated in MEI v3.