27 lines
843 B
Markdown
27 lines
843 B
Markdown
# Data & Discovery
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Data structures, data availability, persistence, and mutability in decentralized applications.
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Data portability
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Decentralized systems do not have a single central system to coordinate updates.
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### Data availability
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No server has a unified global view of a decentralized network.
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Data is only available along user connections or the follow graph, whether that is determined by node or by server.
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Mastodon - No global search functionality
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### Mutability
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Ssb & Hypercore - Messages added to the append-only log are immutable. Applications can choose not to display messages indicated as deleted, but the data cannot be overwritten.
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IPFS - Once added to a network, content is discoverable by its hash. If a copy remains stored on the network, it is re-discoverable by this reference.
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### Data structures
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JSON-LD
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RDF
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