In determining the specification of node names there is some discussion on what should be allowed:

The current "beta" parser allows mixed case and this is used by a small number of nodes.


The options are:
  * Allow mixed case and treat as case sensitive
    * "PiNODE" != "PINODE"
    * Pro: Doesn't break existing nodes
    * Pro: Larger name space
    * Con: mixed case could be confusing
    * Pro: Allows CamelCase names
  * Allow mixed case and treat as case in-sensitive
    * node names could be stored as provided or in upper case (giving two potential sub options) 
    * "PiNODE" == "PINODE"
    * Pro: Doesn't break existing nodes
    * Con: mixed case could be confusing
    * ?? : May allow Camel Case names (depending on how names are stored)
  * Only allow a single case (Upper case only)
    * "PINODE" ("PiNode" isn't permitted)
    * Con: breaks existing nodes
    * Pro: Removes and confusion over name space