Since there is the possibility that the text appears in external projects, the ID tab provides
the opportunity to enter the external ID, thus linking the projects. By default a 
button will be displayed. Click
it to add an ID.
- Provider: Choose the provider (an external project) from the drop-down list.
- Type: Enter the type of the ID, in case such exists.
- External ID: Enter the external ID here (e.g. Trismegistos).
- Add Identifier: Add
another set of information, including the "Provider", "Type" and "External ID"
