As a conclusion to this metadata chapter we would like to give some advice about metadata creation in general:
Always start as early as possible to collect and create metadata. Otherwise chances are high that information is lost or that fixing the incomplete metadata records afterwards will be very costly.
Try to achieve a high but reasonable level of granularity.
When using CMDI (which is required by CLARIN):
Try to reuse as much as possible. It should save you work and will enhance the interoperability.
Be aware that there are conversion methods in place for the most widely used formats – there is no need to reinvent the wheel.