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Concepts

The framework has a small, precise vocabulary. This page defines each term once, in one place, so the concept pages can link here from first use instead of re-explaining. Each entry gives a one-line definition, a quick analogy, and a link to where the idea is developed in full.

The content model​

These are the types that flow through the pipeline and make up the content model.

  • Part: the fundamental streaming unit. Every document is read as a stream of Parts (layers starting and ending, blocks, data, media). Analogy: an event in an event stream. See Content Model.

  • Layer: a structural grouping: a document, a section, or a piece of embedded content. Layers nest: HTML inside a JSON string becomes a child Layer with its own format. Analogy: a node in the document tree.

  • Block: a unit of translatable content: a flat sequence of Runs (the source), its Targets, and any stand-off Overlays. Analogy: a paragraph or a message. Segmentation is an Overlay (defined below) rather than a separate segment type or a structural split.

  • Run: the inline unit inside a Block: a discriminated union of Text and inline codes (placeholders, paired open/close codes, sub-flows, plural and select structures). Inline markup lives in Runs, never in the text itself. Analogy: a text node or a tag in an HTML fragment. See Inline Formatting.

  • Target: the translated (or otherwise produced) counterpart of a Block's source, keyed by VariantKey (defined below). A Block can carry many Targets at once.

  • Overlay: stand-off annotation anchored to a range of Run indices: segmentation, terms, entities, check findings, alignment. Overlays describe the content without altering the source. Analogy: a margin note pinned to a span of text. See Content Model.

  • Anchor: where an Overlay or a Finding attaches: a path into the Block's Runs with a start and end offset, or a key, so the annotation survives edits to the text around it and can be re-resolved after the Runs change. See Content Model.

  • VariantKey: the key that identifies a Target: a locale plus optional tone or channel. Analogy: the address of one rendition of a Block (e.g. fr, or fr + "formal").

  • Resource: the payload a Part carries (a Block, Data, or Media). The Part is the envelope; the Resource is the content.

  • Data: non-translatable structure that must survive the round trip (keys, attributes, layout) but is never translated.

  • Media: binary content (an image, an audio or video clip) carried through the pipeline.

Vocabularies & inline codes​

  • Vocabulary: the typed catalogue of inline-code meanings (formatting, links, code spans, placeholders) that a Run's type draws from, with rules for what may be deleted, cloned, or reordered. See Vocabularies.

  • Semantic type: the meaning attached to an inline code (for example "bold", "hyperlink", "variable"), independent of how any one format spells it.

Processing​

  • Format (reader / writer): the paired components that parse a byte stream into Parts and write Parts back out byte-for-byte. Analogy: a codec: decode in, encode back out. See Formats.

  • Tool: a single processing step that reads Parts and writes Parts. Tools compose. Analogy: a stage in a shell pipeline. See Tools.

  • Flow: a named composition of tools. Analogy: a saved, shareable pipeline definition. See Flows.

  • Pipeline / Executor: the concurrent engine that runs a flow's tools as goroutines connected by channels. See Pipeline.

  • Round trip: reading a document into the content model and writing it back out so that untouched content is byte-for-byte identical. The fidelity guarantee the whole engine is built around. See Formats.

Knowledge stores​

  • Content memory: a store of previously settled content: source segments paired with the targets produced for them, matched exactly or fuzzily to reuse past work. See Content memory.

  • Terms store: a store of approved terminology, used to keep term renderings consistent. See Terminology.

  • Voice profile: the tone, wording and vocabulary rules content is checked and produced against (core/profile). See Voice.

Context​

  • Point (coordinates): where a piece of content sits in a project's context space, on axes such as brand, product and channel. A voice profile, a terms store and gates are bound at a point, so content at the same point is governed the same way. See Projects.

Checks​

  • Check: a test that runs over content and emits findings (the content analogue of a unit test). See Checks.

  • Finding: a single issue a check reports, anchored to where it occurs and carrying a severity. Findings travel with the content as overlays.

Project vocabulary

The recipe (kapi.yaml) and its model are framework code (core/project), as are the context, gate and unit-state packages beside it; the verbs that drive a project (up, status, apply) are Kapi's. Ad-hoc vs. project modes, bindings, and the .kpz/.kbf.json formats are defined under Projects.