dao no longer child of archdesc
@otherlevel missing from <archdesc>
Revert "@otherlevel missing from <archdesc>"

This reverts commit fa22351d1d32b349c6b1ece113b9e0ff01d29cfa.
Undo camelcase in @otherlevel
Removed camelcase from attribute value lists
Removed camelcase from @containerid
Comment re: did-sibling occurrence
Changed dsctype="othertype" to "otherdsctype"

So that it matches the @otherdsctype attribute.
Commented possible mistake re: <dsc> components
Commented define for <div> - no longer used

Only reference to e.div is inside e.div, so I tihnk it's safe to remove
and not used anywhere else.
Added @instanceurl to <recordid>
Added @localtype to <representation>
Comment re: @relatedencoding
Comment re: unitdate/@normal
Changed unitdate to m.mixed.basic

m.mixed.basic.plus was incorrect.
Corrected <unitdatestructured> content model
Fixed camelcase in separatedmaterial
Fixed name="a.dsctab.tPattern" camel case
Fixed typo in "otherfindaid" element name
Fixed error in controlaccess content model

Needed <title>, changed from m.access to m.access.title