tei:rdg

(analysis) indicates one or more elements containing interpretations of
the element on which the ana attribute appears.

classifies the cause for the variant reading, according to any appropriate
typology of possible origins. Sample values include: 1] homeoteleuton; 2] homeoarchy; 3]
paleographicConfusion; 4] haplography; 5] dittography; 6]
falseEmendation

(certainty) signifies the degree of certainty associated with the
intervention or interpretation.

points to one or more change elements documenting a state or revision
campaign to which the element bearing this attribute and its children have been assigned
by the encoder.

points to an element of which the current element is a
copy.

(corresponds) points to elements that correspond to the current element in
some way.

points to elements that are in exclusive alternation with the current
element.

(facsimile) points to all or part of an image which corresponds with the
content of the element.

points to a handNote element describing the hand considered responsible
for the textual content of the element concerned.

(number) gives a number (or other label) for an element, which is not
necessarily unique within the document.

points to the next element of a virtual aggregate of which the current
element is part.

(previous) points to the previous element of a virtual aggregate of which
the current element is part.

(rendition) indicates how the element in question was rendered or
presented in the source text.

points to a description of the rendering or presentation used for this
element in the source text.

(responsible party) indicates the agency responsible for the intervention
or interpretation, for example an editor or transcriber.

points to an element that is the same as the current
element.

selects one or more alternants; if one alternant is selected, the
ambiguity or uncertainty is marked as resolved. If more than one alternant is selected,
the degree of ambiguity or uncertainty is marked as reduced by the number of alternants
not selected.

provides a pointer to the bibliographical source from which a quotation or
citation is drawn.

contains an expression in some formal style definition language which
defines the rendering or presentation used for this element in the source
text

(synchronous) points to elements that are synchronous with the current
element.

classifies the reading according to some useful typology. Sample values
include: 1] substantive; 2] orthographic

(variant sequence) provides a number indicating the position of this
reading in a sequence, when there is reason to presume a sequence to the variants.

(witness or witnesses) contains a space-delimited list of one or more
pointers indicating the witnesses which attest to a given reading.

provides a base URI reference with which applications can resolve relative URI references into absolute URI references.

(identifier) provides a unique identifier for the element bearing the attribute.

(language) indicates the language of the element content using a tag generated according to BCP 47.

signals an intention about how white space should be managed by applications.