Approximate Public Exposure Periods for DQC Rules and Guidance
  • August 1- September 15
  • November 15- December 31
  • May 1- June 15

Public review and comment is a critical part of the process of improving the usability of XBRL filed with the SEC.

The Data Quality Committee sought comment on Variable Interest Entities Guidance from March 16 through May 1, 2020.

The Data Quality Committee seeks comment on version 12 of the DQC Rules during a public exposure period of rules and guidance from April 15 through June 1, 2020. The latest plugin releases are linked at right. See the schedule at right for approximate public exposure period timing.

Generally, rules are considered for approval within 45 days of Public Exposure, and effective within 90 days of approval.

For each rule or guidance item listed below, click the title to review its comprehensive documentation. To post your comments, you will need to login and agree to Terms and Conditions for Public Comments. Comments received can be reviewed without logging in.

When providing feedback about guidance or a rule, please consider the following:

  • What is the concern with the proposed rule? Please be as specific as possible and include examples using data submitted to the SEC.
  • How should the rule be revised?
  • How does the revision to the rule improve the usability of the data?

Use this link for general feedback on all rules and guidance.

Public Exposure of Validation Rules & Guidance - RSS

Comments due by Monday, June 1, 2020:


Negative Values

Version 12 includes elements for public comment from the 2020 US GAAP Taxonomy. See DQC_0015_ListOfElements spreadsheet – v12 for details.

Elements that should not be reported with negative values. Documentation includes a list of elements tested.

This rule is for filings using US GAAP Taxonomies, only.
DQC 0080 Negative Values is for filings using IFRS Taxonomies


Invalid Value for Percentage Items

This rule identifies where filers have used a percentage item type (as defined in the US GAAP taxonomy) with a value that is greater than the value of 10.

The rule identifies those elements that have a num:percentItemType data type that are base taxonomy elements. (Not extension elements) It then checks that the values reported are less than or equal to 10. If greater than 10 then an error is reported. The rule does not run on those elements which contain the text string “EffectiveIncomeTaxRate” in the concept name.



IFRS Non Positive Items

This rule identifies where filers have used a positive value for an item that should be negative. The rule consists of two sub components.



Durational Aggregation

This rule identifies where the values of a durational element for a series of periods of time do not aggregate to the value representing the aggregated period in the instance.


US Maturity Schedules

In the 2020 taxonomy, the definition of the maturity schedule elements has changed. The changes in the 2020 taxonomy will require retagging of most subsequent quarterly filings. This rule is intended to check that the changes in the 2020 taxonomy are applied to the instance documents using this taxonomy.


Scale – Common Stock Outstanding

The rule compares the values of the two elements and reports an error if one of the numbers is more than 100 times larger than the other number.