Data Property: start

comment "The starting position of the segment of text or bytes. The first character/byte in the full text/stream is position 0. The character/byte indicated at position oa:start is included within the selected segment. See oa:DataPositionSelector and oa:TextPositionSelector." (en)
isDefinedBy http://www.w3.org/ns/oa#
label "start" (en)

http://www.w3.org/ns/oa#start