Here are the major changes:

Changes to datacite_xml.py:

• added relatedItem to _repeatableElementContainers and form colleciton formColl
• defined _elementList_relatedItem to handle embedded elements with different topological order than what they appear at the element level.
• moved test datasets and test code to tests/test_datacite.py

Changes to form_object.py:

• defined RelatedItemForm class
• initialized formset RelatedItemSet
• added validation functions for the relatedItem form
• added relatedItem to the form data processing function getIdForm_datacite_xml()
• changed a few select options lists from local variable to global so they can be shared by different functions

Changes to jquery.formset.twobutton.js:

• refactored the clearField function
• replaced duplicated code with the clearField function
• provided a bug fix to the addButton.click(function() by clearing fields after clone the sub-form; otherwise the selected value of the last sub-form will stay

Other changes:

• added form template _datacite_relatedItem.html
• added test cases to test_datacite.py to test form and Datacite XML data conversions:
  • formElementsToDataciteXml()
  • dataciteXmlToFormElements(mockxml_datacite)
• added test_relateditem_form.py to test the related item form
• defined a function get_field to access form field names with hyphens