Adding all relevant fields and answers that I know about. Please update other fields.
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Developer - Dgraph Labs
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Current Release - v0.4.4
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Server Operating Systems - Linux, OS X
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Data Scheme - schema-free
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Typing(predefined data types such as float, int) - Yes
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XML support - No
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Secondary indexes - None
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SQL(support SQL standards) - No
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APIs and other access methods - RESTful HTTP API, GraphQL query language
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Supported Programming Languages - Go, Python, Java
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Server side scripts - Yes(loader, assigner)
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Triggers - No
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Partitioning methods - Data is partitioned according to the predicates. This helps in minimizing network calls in a query.
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Replication methods - RAFT Consensus algorithm
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MapReduce - None
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Consistency Concepts - @mrjn?
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Foreign keys - No
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Transaction concepts - None (https://wiki.dgraph.io/Design_concepts#Note_on_Transactions)
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Consistency - Yes
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Durability - Yes
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User Concepts(Access Control) - No