show export button only for specific categories in mir_rights

Description

Let us specify an x-attribute in http://www.mycore.org/classifications/mir_rights to tag categories which mark copyright protected content.
Example:

<category ID="publisher_xy_license">
    <label xml:lang="de" text="Verlagslizenz xy" />
    <label xml:lang="en" text="Publisher License xy" />
    <label xml:lang="x-protected" text="MeL" />
  </category>

Environment

None

Status

Assignee

Sebastian Hofmann

Reporter

Kathleen Neumann

Labels

None

External issue ID

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External issue ID

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External issue ID

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URL

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External issue ID

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External issue ID

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Components

mir-module

Fix versions

0.4

Affects versions

0.4

Priority

Medium