comment "A Selector that describes a textual segment by means of quoting it, plus passages before or after it.
For example, if the document were "abcdefghijklmnopqrstuvwxyz", one could select "efg" by a oa:prefix of "abcd", the quotation of oa:exact "efg" and a oa:suffix of "hijk".
The text MUST be normalized before recording.
Each TextQuoteSelector MUST have exactly 1 oa:exact property.
Each TextQuoteSelector SHOULD have exactly 1 oa:prefix property, and MUST NOT have more than 1.
Each TextQuoteSelector SHOULD have exactly 1 oa:suffix property, and MUST NOT have more than 1." (en)
label "TextQuoteSelector" (en)