# Oxiland 0.4 compatibility report
Status: complete
Milestone: 0.4 — Storage and transactions
Oxiland version: 0.4.0
Oxigraph version: 0.5.9
Inventory:
[`compatibility/inventory/redland-1.0.17-oxiland-0.4.json`](https://github.com/eddiethedean/oxiland/blob/main/compatibility/inventory/redland-1.0.17-oxiland-0.4.json)
## Claim
Oxiland 0.4 provides a supported Fjall durable store (format v1, ADR-006),
`Model::transaction` with commit/rollback, sync/clear/bulk helpers, capability
reporting, read-only opens, legacy-backend `Unsupported` disposition, and
N-Quads archival import/export. Compatibility is scoped to the curated 0.4
inventory slice and the tests linked from it.
## Evidence
| Format v1 reopen | `tests/storage.rs::format_v1_round_trip_reopen` |
| Legacy migrate | `src/storage/fjall.rs::legacy_store_without_meta_requires_migrate` |
| Transaction commit/rollback | `tests/storage.rs` transaction_* |
| Sync / clear | `tests/storage.rs::clear_and_clear_graph`, reopen+sync |
| Capabilities / legacy names | `tests/storage.rs::legacy_backends_are_unsupported` |
| Read-only | `tests/storage.rs::read_only_rejects_writes` |
| Atomic transactional load | `tests/storage.rs::transactional_load_is_atomic_on_parse_failure` |
| Archival N-Quads | `tests/storage.rs::archival_export_import_round_trip` |
| Concurrent readers | `tests/storage.rs::find_under_concurrent_writers_stays_consistent` |
| Transaction panic recovery | `tests/storage.rs::transaction_panic_clears_in_transaction_flag` |
| Same-thread txn reads | `tests/storage.rs::same_thread_reads_during_transaction_do_not_deadlock` |
| create(false) / read-only guards | `tests/storage.rs::open_create_false_empty_dir_fails`, `read_only_empty_dir_fails_without_init` |
| UTF-8 BOM import/parse | `tests/storage.rs::import_merges_and_strips_utf8_bom`, `tests/io.rs` BOM cases |
| Inventory / API | `redland-1.0.17-oxiland-0.4.json`, `api/oxiland-public-api.txt` |
| Design / ADR | `docs/design/0.4-storage-api.md`, ADR-006, `0.4-legacy-storage.md` |
## Not claimed
- Native Redland binary store importers
- Additional durable engines beyond Fjall
- Multi-tenant hardened database security
- Format compatibility across future Oxiland major versions without migration
- C ABI / Python storage bindings