[V] $lib

const $lib: TypeSpecLibrary<{
  invalid-ns-declaration-member: {
     default: CallableMessage<["name"]>;
    };
  ns-enum-not-declaration: {
     default: "Enum member used as namespace must be part of an enum marked with @nsDeclaration.";
    };
  ns-missing-prefix: {
     default: "When using a string namespace you must provide a prefix as the 2nd argument.";
    };
  ns-not-uri: {
     default: "Namespace namespace is not a valid URI.";
    };
  prefix-not-allowed: {
     default: "@ns decorator cannot have the prefix parameter set when using an enum member.";
    };
}, Record<string, any>, "attribute" | "unwrapped" | "ns" | "nsDeclaration">;

TypeSpec Xml Library Definition