In P4, EpiDoc extended <lb> with the @type attribute in order to offer the value 'worddiv' to mark a word-dividing linebreak (i.e. one indicated by a hyphen in the original). @type was not as still in P5 is not an available attribute on <lb/>. For conformance we need to come up with a new way to indicate this feature, or request that P5 add or recommend a handling, or perhaps both.
First stop, TEI-L.