RMT Reference

This section is the thematic reference for RMT vNext. The learning path teaches the flow; the reference explains the exact meaning of each operator, keyword and fixed catalog value.

JSON-RMT is no longer the normal authoring path. It remains only as compatibility test material.

Syntax

RMT vNext is block-based. A document consists of top-level declarations such as import, template, surface, remote surface, state, selector, datasource, action, portal, overlay, resource, validation and transition.

Allowed contexts

Operators are context-sensitive. lane is only valid in surface, lifecycle operations such as mount and hydrate are only valid in lane or slot, and event payloads only belong in on ... -> action blocks.

Parameters

Parameters are static values, identifiers, paths, strings, numbers, booleans, arrays or simple condition expressions. RMT vNext does not allow function calls in when.

Description

• Document, Template and Import
• Primitives
• State, Selectors and Data
• Actions and Events
• Surfaces, Lanes and Lifecycle
• Validation and Transitions
• Security and Policies
• Remote Surfaces
• Conditions and Expressions
• Enums and Catalogs

Use this page as the index, then follow the domain pages when you need exact operator shape, diagnostics or a compilable example. The reference is intentionally stricter than the learning path: if a pattern is not described here, treat it as unavailable until a contract, compiler fixture and runtime gate are added.

Examples

template reference.overview {
  state app.status type object preserve {
    initial {
      text "Ready"
    }
  }

  selector app.statusView from state app.status {
    output StatusView
  }

  portal app.root root "#app" layer surface

  surface dashboard kind page component x-section {
    portal app.root
    lane visible weight 80 {
      hydrate status.card from selector app.statusView
    }
  }
}

Diagnostics

The parser reports context errors when an operator appears in the wrong place. The compiler adds semantic errors when a referenced primitive record is missing or an action path is incomplete.

Related operators

Start with template, surface, state, selector, action, lane, mount, hydrate, on, emit and when.