About
"[A] free, open access resource for the electronic publication of primary field research from archaeology and related disciplines. Open Context provides an integrated framework for users to search, explore, analyze, compare and tag items from diverse field projects and collections."
Openness: Not Open
Access
While data can be expressed in XML formats and downloaded in bulk, Open Context lacks clear documentation on how to retrieve bulk datasets in an automatable manner.
License
http://www.opencontext.org/terms.html
"Open Context is a searchable resource that recognizes the importance of authorship in scholarship. Unless explicitly indicated, the content in Open Context is NOT in the public domain. Contributors to Open Context own copyright to the content they contribute. Contributors license their content for certain uses. By using Open Context, you agree to the licensing conditions that contributors impose on their content."
http://www.opencontext.org/licensing.html
Open Context encourages but does not require use of the Creative Commons Attribution License. More restrictive licenses that do not comply with the OKD are allowed in Open Context.
"Open Context provides contributors with choices among several Creative Commons open licenses. In addition, contributors may hold "all rights reserved" with standard copyright." (Any you are allowed to use any CC license including those that do not comply with the Open Knowledge Definition.