Feature: create node from None with data.frame

[niszet]

Up to now, create node can be done by coping an existing node object. Not so, it should be made from nothing with given data.frame...

[niszet]

None I write a function to generate xml node from a row of data.frame, it can be used to run all rows of data.frame...

This should have several modes...

• all tags must be set as same as columns
  • column's value must be used whenever.
  • formal check (missing parent tag) and warning if the value is not adequate
    • this is "update"
• missing columns should be deleted from target node?
  • this is "delete"
• extra columns should be generated in target node?
  • this is "create"

so, i.e. options are create=c(T, F), delete=c(T, F), update=c(T, F) and so on...