RMT Reference: Enums and Catalogs

This page lists fixed values used by operators.

Syntax

Catalog	Values	Allowed contexts	Parameters	Function	Diagnostics	Related operators
Lane names	critical, visible, user-blocking, transition, resource, a11y, idle, background, diagnostics	lane, lane transition, remote events	identifier	Maps work to a scheduling class.	Unknown lane names can be catalog diagnostics.	lane, weight
Source kinds	endpoint, sse, worker, selector, state, datasource, fixture, resource	from, fallback, source	identifier plus reference	Describes where data or work comes from.	Parser reports disallowed source kinds.	from
Overlay kinds	tooltip, toast, popover, lightbox, menu, dialog	overlay kind	identifier	Classifies overlay UI.	Unknown overlay kinds can be semantic diagnostics.	overlay
Resource kinds	object-url, stream, observer, timer, lazy-import	resource kind	identifier	Classifies cleanup and ownership behavior.	Missing owner can be reported.	resource, destroy releases
Transition effects	fade, crossfade, slide-left, slide-right, slide-up, slide-down, scale, pop, zoom, flip, rotate, expand, collapse, fade-blur, shared-element, layout-flip, none	transition effect	identifier	Selects visual surface transition.	Unknown effects can be catalog diagnostics.	transition
Trust boundary identifiers	xtend.security.sanitizing-boundary.v1, xtend.security.streaming-boundary.v1, xtend.security.worker-boundary.v1, xtend.security.remote-surface.v1	trust boundary	string	Names host-owned security boundaries.	Boundary must be a string.	sanitize, remote surface

Allowed contexts

Catalog values appear in clauses that expect static values. They are not JavaScript enums and are not imported.

Parameters

All values are literal in RMT source. Trust boundaries are written as strings; the other values are usually identifiers.

Description

Catalogs keep authoring stable and inspectable. New values need tooling, docs and test coverage.

Examples

template reference.catalogs {
  resource preview.file kind object-url owner surface.preview
  overlay notice kind toast portal app.root
  portal app.root root "#app" layer surface

  transition preview.open {
    trigger action preview.show
    from surfaces [preview.closed]
    to surfaces [preview.open]
    effect crossfade
    durationMs 160
    easing "ease-out"
    lane transition
  }

  action preview.show {
    input id string
    reduce state.preview.id = input.id
    emit preview.opened with id input.id
  }

  state preview.id type string initial ""

  surface preview kind page component x-section {
    portal app.root
    lane visible weight 80 {
      mount preview.card from endpoint preview.card {
        trust boundary "xtend.security.sanitizing-boundary.v1"
      }
    }
  }
}

Diagnostics

Parser diagnostics check syntax and context. Catalog and semantic checks report unknown or incomplete values.

Related operators

lane, from, overlay, resource, transition, trust boundary.

Related reading

The RMT reference index explains how enum and catalog names are resolved by other records. Related article