[extra Quality] - Fgoptionalbonussoundtracksbin
I have interpreted fgoptionalbonussoundtracksbin as "Factorio Game: Optional Bonus Soundtracks (Binary/Build)".
4. Data Model and Metadata Schema
- Define top-level container "fgOB" (feature-guarded optional bundle).
- Core JSON-LD metadata (human- and machine-readable) with compact binary companion index:
- id: UUID v4
- name, version (semver), created_at (ISO 8601)
- feature_flags: list of flag identifiers and activation criteria (e.g., user owns DLC, platform, region)
- assets: array of asset objects:
- asset_id, type (audio/mp3, audio/flac, image/png), path, size, hash (SHA-256), encoding (codec), channels, sample_rate
- license: SPDX identifier or custom license blob
- provenance: creation tool, contributor IDs (pseudonymous), signature
- optionality: required | optional | gated
- delivery: content_address (CID for IPFS-style), endpoints (HTTPS mirrors), chunking info
- privacy: telemetry_policy (none/minimal/opt-in), retention_policy
- signature: cryptographic signature (Ed25519) over metadata
- Companion binary index: compact radix tree mapping asset paths to offsets and chunk manifests to facilitate partial reads.
7. Delivery & Update Protocols
- Manifest-first retrieval: client fetches metadata only, evaluates feature_flags locally, and decides which assets to request.
- Partial download via HTTP range requests or chunked endpoints; support for P2P/CDN fallback.
- Delta updates: binary diffs for changed chunks using Rsync-like signatures or Brotli-based patching.
- Offline installation: verify signatures then install without contacting servers.
- Privacy-preserving retrieval strategies:
- Proxying via privacy gateways
- Batch and randomized timing of requests
- Use of anonymous content-addressed networks (IPFS-like) for static bonus content
3. Common Use Cases
- Deluxe / Ultimate Edition bonuses – Extra soundtracks included as a pre‑order or special edition reward.
- Post‑launch DLC – Optional music packs downloaded separately.
- Modding – In community‑modded fighting games (e.g., MUGEN, IKEMEN, or OpenBOR), such a file may contain custom music for bonus stages or hidden characters.
