=  high level requirements for schema development =

== technical ==
  * schema language will be Relax NG 
  * compact schema syntax will be used 
  * schema will be modularized (cf. HTML schema) 
  * trang will be used for conversion 

== procedural ==
  * schema modules will be maintained with svn 

== design & capabilities ==
  * compatibility with archimedes will be ensured when possible 
  * compatibility with TEI P5 will be maintained in the absence of a reason to depart from TEI P5 
  * full use of XML potentials should be made 
  * Dublin Core will be used for metadata 
  * RDF will be used to indicate typing for DC metadata 
  * use of entities will be minimized or eliminated (where and if possible) 
  * vocabularies will be reused when possible 
  * e.g. HTML tables; MathML; ChemML; SVG 

== modularity ==
  * core module will incorporate base transcription mecanism for printed books (through 19th c.) 
  * a module for manuscriptology and textual criticism (emendation; conjecture) 
  * possibilities for modules for verse, etc.