Clarify use and behavior of landingPage

[philipashlock]

As per GSA/data.gov#445

[gbinal]

This should be addressed by the above commit.

[gbinal]

Thank you for driving the conversation around this issue and helping to assemble the v1.1 metadata update.

There appears to be strong consensus around this issue, which has been accepted in the v1.1 update and merged into Project Open Data. Project Open Data is a living project though. Please continue any conversations around how the schema can be improved with new issues and pull requests!

It's important for government staff as well as the public to continue to collaborate to make the Open Data Policy ever better. Though the v1.1 update is a substantial update, future iterations do not have to be, so whatever your ideas - big or small - please continue to work with this community to improve how government manages and opens its data.