Glossary

ref::path

Address of data in a registered source. ref selects the source; path selects content inside it. An optional @attribute suffix selects metadata.

basedata key

Key of one BaseData object inside a DataBundle, such as signal, Q, or mask.

processing key

Key of a DataBundle inside ProcessingData, such as sample or background.

dependency contract

A step’s declared external source references, processing reads, and processing writes.

dirty step

A step selected for partial re-execution because it reads changed input or is downstream of another dirty step.

named uncertainty

Absolute one-standard-deviation contribution stored under a stable name.

rank of data

Number of trailing dimensions representing scalar, curve, image, or volume data, separate from leading scan/frame dimensions.

chunk plan

Immutable description of expected chunk identities and destination layouts.

chunk spec

Selection and placement contract for one chunk in a plan.

runtime policy

Trusted or restricted rules controlling filesystem roots, custom imports, payload limits, and other server capabilities.