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Common Data Format Research Group: Common Data Format (CDF) Ballot Styles Subgroup

Group Information

Name: Common Data Format Research Group: Ballot Styles Subgroup

Purpose: This group will develop a Ballot Definition CDF addressing the topic of ballot style interoperability between ballot producing systems and scanners, as well as inform revisions to the Cast Vote Record Common Data Format.


  • Gain an understanding of how current systems capture vote selections, as well as VVSG 2.0 requirements.
  • Build a logical data model containing the required classes, attributes and other elements for the contest selections use-case.
  • Create one or more new common data format specifications implementing the logical data model.   
  • Supporting references:
  • Election Modeling Semantic Model: Ballot Definition

Logistics: All meetings will be held using conferencing software, and members will receive information on upcoming meetings and agendas.


  • Chair
    • Name: John Dziurlaj
    • Email: john [at] (john[at]turnout[dot]rocks)

Email list

Joining or leaving 

  • To subscribe to this group, send email to cdf-ballot-styles [at] (cdf-ballot-styles[at]list[dot]nist[dot]gov)?subject=subscribe
    • NOTE: This is equivalent to sending a blank email to cdf-ballot-styles+subscribe [at] (cdf-ballot-styles+subscribe[at]list[dot]nist[dot]gov) with subject line "subscribe"
  • Unsubscribe: To unsubscribe from this group, send email to cdf-ballot-styles+unsubscribe [at] (cdf-ballot-styles+unsubscribe[at]list[dot]nist[dot]gov)
  • Help: If you have any problems joining or leaving the list, please send your request to voting [at] (voting[at]nist[dot]gov)
  • General information regarding the tasks of signing up for Google Group email lists, and related information, may be found at the following page.

Group Scope

  • This group has been organized for only the above-stated purpose.
  • This group is NOT for the purpose of discussing former VVSG 2.0 requirements.
    • For all comments or considerations regarding the VVSG 2.0 requirements as approved by the EAC on February 10, 2021, please send those to vvsg [at] (vvsg[at]eac[dot]gov) .

Membership Information

Created April 6, 2021, Updated December 16, 2021