"Preserves <something>", for example "Preserves data", reads like "it preserves data". Probably less so in the middle of a sentence, due to the uppercasing, but in the TOC it reads like bullet points enumerating what is preserved.
Putting Preserves in italics would be an alternative.
The name nevertheless feels awkward to me, also in spoken conversation. A made-up word like maybe “Pres” or “Edal” (from “expressive data language”) would work better IMO.