@comment{

Entry contains url and doi fields; these should be discarded since the
options field specifies url=false, doi=false.

Exception: As in standard biblatex, in online entries url should never be
discarded, even if options contains url=false.

}

@article{item1,
    Author = {Author, Andy},
    Date = {2012},
    Doi = {1234/5678.90},
    Journal = {Journal},
    Options = {url=false, doi=false},
    Title = {Title, Any Entry Type Except online},
    Url = {http://foo.bar}
}

@online{item2,
    Author = {Author, Andy},
    Date = {2012},
    Doi = {1234/5678.90},
    Journal = {Journal},
    Options = {url=false, doi=false},
    Title = {Title, Entry Type online},
    Url = {http://foo.bar}
}

---
references:
- id: item1
  type: article-journal
  author:
  - family: Author
    given: Andy
  issued:
  - year: '2012'
  title: Title, any entry type except online
  container-title: Journal

- id: item2
  type: webpage
  author:
  - family: Author
    given: Andy
  issued:
  - year: '2012'
  title: Title, entry type online
  container-title: Journal
  URL: http://foo.bar
...