DcDCAT-AP provides a way for Distributions to specify the license, but many (most) open data licenses include an "attribution" clause (for instance, CC-BY and the Flemish license for free re-use). It is currently not possible to specify how attribution should be done.
Some work has been done in this field:
- The The Creative Commons Rights Expression Language (ccREL) provides a way to specify the name and/or URL which should be mentioned through the properties: http://creativecommons.org/ns#attributionURL and http://creativecommons.org/ns#attributionName
- The ODI's Open Data Rights Statement Vocabulary (ODRS) provides similar properties such as http://schema.theodi.org/odrs/#attributionText and http://schema.theodi.org/odrs/#attributionURL
Further relevant work is done by http://rightsstatements.org/
In the case of the Flemish licenses, it is important to allow publishers to specify a textual (Literal) description of the attribution. The nearest fit to this requirement seems to be ODRS' attributionText.