Reports generated by governmental and non-governmental organizations are currently difficult to describe using schema.org, as they aren't a scholarly article, but don't really fit in anywhere else under CreativeWork either. Report as a type under CreativeWork would give this common publication type an accurate description. Properties for Report could be similar to that of Article, but would also include the report number, a key piece of metadata to describe reports.

• Report
  • reportBody (Text) The actual body of the report.
  • pagination (Text or Integer) Any description of pages that is not separated into pageStart and pageEnd; for example, "1-6, 9, 55" or "10-12, 46-49".
  • pageStart (Text or Integer) The page on which the work starts; for example "138" or "xvi".
  • pageEnd (Text or Integer) The page on which the work ends; for example "138" or "xvi".
  • wordCount (Integer) The number of words in the text of the Report.
  • reportNumber (Text or Integer) The number or other unique designator assigned to the Report by the publishing organization.

This is an example of a report that I am currently struggling to properly describe with schema.org- a Report CreativeWork type would immediately be put to use here: http://pubs.er.usgs.gov/publication/sir20145235