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Optimus is a validator for microformats. This page documents known issues grouped by area of support. Feel free to add new issues, or comment on existing issues.


Optimus validator is temporary not working!

Therefore any page you will check will return the message: "Microformats at this page have no errors. Congratulations." which is a false message. We will update this page when and if Optimus will work again.

issues with 0.8

JSON output b0rked


hAtom validation

properties are errantly reported as not specified

Bug reported 2009-05-27:

When validating microformats.org, Optimus states on a single hAtom hentry that both:

Required property ‘author’ not specified.

Required property ‘updated’ not specified.

Required property ‘bookmark’ not specified.

Required property ‘entry-title’ not specified.


author ... Ben Ward

updated / 2009-05-15T01:16:43

bookmark / In Search of Microformats

entry-title / In Search of Microformats

obviously if Optimus can find those properties on the hentry, then they are not "not specified".

bookmark is not required

Bug reported 2009-05-27:

According to hAtom, rel-bookmark is an optional property of hentry, however, when validating microformats.org, Optimus states:

Required property ‘bookmark’ not specified.


better error documentation

see also

optimus-issues was last modified: Monday, February 6th, 2012