tei:usg

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

(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.

contains a PID (persistent identifier) that aligns the given element with the appropriate Data Category (or categories) in ISOcat.

contains a PID (persistent identifier) that aligns the content of the given element or the value of the given attribute with the appropriate simple Data Category (or categories) in ISOcat.

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

gives an expanded form of information presented more concisely in the
dictionary

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

indicates an anchor element typically elsewhere in the document, but
possibly in another document, which is the original location of this
component.

gives a reference to another element, where the original appears as a
merged form.

(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.

(normalized) gives a normalized form of information given by the source
text in a non-normalized form

(optional) indicates whether the element is optional or
not

(original) gives the original string or is the empty string when the
element does not appear in the source text.

(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.

gives the list of split values for a merged form

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 usage information using any convenient typology.
Sample values include: 1] geo(geographic) ; 2] time; 3] dom(domain) ; 4] register;
5] style; 6] plev(preference level) ; 7] lang(language) ; 8] gram(grammatical) ; 9]
syn(synonym) ; 10] hyper(hypernym) ; 11] colloc(collocation) ; 12] comp(complement)
; 13] obj(object) ; 14] subj(subject) ; 15] verb; 16] hint

gives a value which lacks any realization in the printed source
text.

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.