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+# Services
+
+Nogle online services understøtter fri data bedre end andre.
+
+**NB!**
+Dette er en blot en beslægtet anbefaling til inspiration
+(*ikke* en data-stjerne).
+
+
+## Solid
+
+Solid er et sæt spilleregler (en protokol) for services
+til at lagre, udveksle og behandle 5-stjernet data.
+
+[Solid]: https://solidproject.org/about#data
+  "Solid - You can store any kind of data in a Solid Pod"
+
+
+## Local-first
+
+> "local-first software":
+> a set of principles for software
+> that enables both collaboration *and* ownership for users.
+> [...]
+> The key difference between traditional systems and local-first systems
+> is not an absence of servers,
+> but a change in their responsibilities:
+> they are in a supporting role, not the source of truth.
+
+Fra [Ink & Switch artikel] udgivet i 2019 om local-first principper,
+som undersøger konkrete cases implementeret vha. [CRDT].
+
+[Ink & Switch artikel]: https://www.inkandswitch.com/local-first/
+  "Local-first software - You own your data, in spite of the cloud"
+
+[CRDT]: https://en.wikipedia.org/wiki/Conflict-free_replicated_data_type
+  "Wikipedia-artikel (engelsk) om Konflikt-fri replikerede datatyper (CRDT) indenfor distribuerede systemer"
+
+Se også [nyere artikel] fra 2023 om professionelle skribenter som case.
+
+[nyere artikel]: https://www.inkandswitch.com/upwelling/
+  "Upwelling -Combining real-time collaboration with version control for writers"