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Guides

These guides provide in-depth coverage of cross-cutting topics in Layers. Each guide explains how multiple lexicons and primitives work together to support a particular capability.

  • Temporal Representation: Composable temporal primitives for dates, durations, intervals, recurrence, and temporal relations (Allen's Interval Algebra). Maps to TimeML, OWL-Time, and ISO 8601.

  • Spatial Representation: Composable spatial primitives for geographic coordinates, regions, paths, and spatial relations (RCC-8). Maps to GeoJSON, WKT, ISO-Space, SpatialML, and computer vision formats.

  • Multimodal Annotation: How the polymorphic anchor type supports annotation across text, audio, video, image, and paged documents. Covers media records, temporal and spatial anchoring, and practical examples.

  • Knowledge Grounding: Linking annotations to external knowledge bases (Wikidata, FrameNet, WordNet), building typed property graphs, defining ontologies, and the entity grounding workflow.

  • Psycholinguistic Data: How self-paced reading, eye-tracking, EEG, MEG, and fMRI data map to Layers primitives. Covers stimulus generation, behavioral responses, neural signals, and experimental design.

  • Judgment Data: The full lifecycle of linguistic judgment data: experiment definition, stimulus generation, data collection, and agreement analysis. Covers categorical, scalar, ranking, span selection, free text, pairwise comparison, and best-worst scaling tasks.

  • Annotation Design: Annotation project design metadata: source method, annotator redundancy, adjudication, and quality criteria. Covers treebanks, sembanks, crowd-sourced corpora, silver annotation, and conversion projects.

See Also​