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This document describes a possible design for data access APIs. At this time it is purely meant to facilitate discussion in the Butler Working Group.

Butler Design

• Overview
• Operations
  • Basic I/O
  • Composites
  • Transferring Registries and Datastores
  • Remote Access and Caching
  • SuperTask Pre-Flight and Execution
  • DataUnit Updates and Inserts
• Abstract Interfaces
  • Registry
  • Datastore
  • TableSet
• Butler
  • Transition
  • Python API
• Describing Datasets
  • Dataset
  • DatasetType
  • StorageClass
  • DatasetRef
  • InMemoryDataset
  • StorageHint
  • URI
• Grouping and Provenance
  • Collection
  • Run
  • Quantum
  • QuantumGraph
• DataUnit Reference
  • DataUnit
  • AbstractFilter
  • Camera
  • PhysicalFilter
  • PhysicalSensor
  • Visit
  • ObservedSensor
  • Snap
  • VisitRange
  • SkyMap
  • Tract
  • Patch
• DataUnit Joins
  • Calibration-Observation Joins
  • Spatial Joins
• Dataset-DataUnit Joins
  • PhysicalFilterDatasetJoins
  • PhysicalSensorDatasetJoin
  • VisitDatasetJoin
  • SnapDatasetJoin
  • VisitRangeDatasetJoin
  • AbstractFilterDatasetJoin
  • TractDatasetJoin
  • PatchDatasetJoin