The import function now has an array of what fields are of type file.  Next we need to put the file into the file system and to add the info to the node data.

Import of nodes looking fine.  It looks like field_data_body and field_revision_body ARE cleared out when nodes are deleted. Now need to test nodes with fields.

New nodes will now be created - but only after the field_data_body and field_revision_body tables have been cleared out.

Need to get node_save to save a node with a pre-existing nid value - may use node merge or upsert type function.

Worth noting at this point that importing nodes will delete any nodes which do not exist in the dataset file - now need to get new nodes created from nodes in the dataset file.

Worth noting at this point that importing nodes will update any existing nodes to match what is in the dataset file.

Node export now reports which dataset files have been created - and correctly catches if the user has not selected any content types when exporting nodes.

Noe import is now running without errors - but no nodes are being imported - need to carry out further testing.

Working through node insert code - just looking to use db_merge when inserting records with existnig ID's.