Hi Christian,
in general, SAP PLM (potentially together with EHS Management) and our Enterprise Search should be applicable for your inquiry.
Responses to your individual questions:
1. Yes, all directives can be stored in SAP's DMS.
2. Yes, full text and attribute-based search is provided in DMS.
3. Yes, Enterprise Search allows for internal and external sources of content.
4. Yes, notifications on document changes (e.g. new versions) can be triggered.
5. Yes, also bundling is possible, either as multiple original files to a single document info record, or as a ZIP file as original attached to a single document info record that is linked to the material master via an object link.
Hope this helps.
Ulf.