Summary
Add a small `--rights ` flag (and possibly `--rights-from-file `) on `dpub convert` that stamps a `dc:rights` element in the EPUB's OPF metadata.
Why
Came up in a discussion with the maintainer about copyright information in DAISY books. DAISY 2.02 NCC files sometimes carry rights information; sometimes not (the reference Belgian title in our memory tests does not have a `dc:rights` field). EPUB 3 readers and aggregators surface `dc:rights` in book metadata, so producers may want to assert it explicitly even when the source doesn't.
This is also useful for the EAA-context narrative: producers redistributing accessibility-exception copies often need to clarify the rights frame they're operating under (Marrakesh Treaty / EU exception). A simple `--rights` flag lets them stamp that text into every conversion in their pipeline without post-processing.
Suggested shape
```
dpub convert -o book.epub \
--rights "© 2008 Geertje De Ceuleneer / PHK. Distributed under accessibility exception."
```
Or, for longer text:
```
dpub convert -o book.epub --rights-from-file rights.txt
```
If `--rights` is not provided, dpub keeps the current behaviour: `dc:rights` from the source DAISY metadata if present, omitted otherwise.
Implementation
- Add `PackageMetadata.rights: Option` to `crates/epub3-writer/src/model.rs` (Optional — surfaces as `dc:rights` in `writers.rs::write_opf_metadata`).
- Wire through `ConvertOptions.rights` in `dpub-convert`, sourced from CLI.
- Default behaviour: copy from `book.metadata().rights` if present in the DAISY source; CLI flag overrides.
Roughly 1 hour of work plus tests.
Out of scope
- Rights-language detection (English vs Dutch).
- Standard rights statement libraries (CC, Marrakesh, etc.). Plain text is enough for v1; structured statements are a future enhancement.
Summary
Add a small `--rights ` flag (and possibly `--rights-from-file `) on `dpub convert` that stamps a `dc:rights` element in the EPUB's OPF metadata.
Why
Came up in a discussion with the maintainer about copyright information in DAISY books. DAISY 2.02 NCC files sometimes carry rights information; sometimes not (the reference Belgian title in our memory tests does not have a `dc:rights` field). EPUB 3 readers and aggregators surface `dc:rights` in book metadata, so producers may want to assert it explicitly even when the source doesn't.
This is also useful for the EAA-context narrative: producers redistributing accessibility-exception copies often need to clarify the rights frame they're operating under (Marrakesh Treaty / EU exception). A simple `--rights` flag lets them stamp that text into every conversion in their pipeline without post-processing.
Suggested shape
```
dpub convert -o book.epub \
--rights "© 2008 Geertje De Ceuleneer / PHK. Distributed under accessibility exception."
```
Or, for longer text:
```
dpub convert -o book.epub --rights-from-file rights.txt
```
If `--rights` is not provided, dpub keeps the current behaviour: `dc:rights` from the source DAISY metadata if present, omitted otherwise.
Implementation
Roughly 1 hour of work plus tests.
Out of scope