Filter

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Filter",
  "title": "Filter",
  "type": "object",
  "description": "A filter expression that constrains event delivery to events matching specific criteria. Filters can use attribute equality, CESQL expressions, or composite logic (all, any, not).",
  "properties": {
    "dialect": {
      "type": "string",
      "description": "Identifies the filter dialect. Use 'cesql' for CloudEvents SQL expressions, or 'exact'/'prefix'/'suffix' for simple attribute matching.",
      "enum": [
        "cesql",
        "exact",
        "prefix",
        "suffix",
        "all",
        "any",
        "not"
      ]
    },
    "expression": {
      "type": "string",
      "description": "The filter expression in the specified dialect. For CESQL, this is a SQL-like expression referencing CloudEvent attribute names."
    },
    "filters": {
      "type": "array",
      "description": "For composite filter dialects (all, any, not), the nested filters to evaluate.",
      "items": {
        "$ref": "#/components/schemas/Filter"
      }
    }
  }
}