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EXTERNAL_UNAVAILABLE — An outside dataset the question needs is not pinned

For LLMs4 sections

What it means

Section titled “What it means”

Some package functions read from datasets kept outside the package: zone tables, tariff schedules, reference lists. The package declares which dataset it needs and under what binding, and the case pins the exact snapshot to read. When no snapshot is pinned for that binding, the read has no source, and the question that depends on it ends here instead of reading whatever happens to be at hand.

This status is about the missing pin, not the package. The function and the rules around it are fine; the dataset they should read was never attached to the case.

When you see it

Section titled “When you see it”
Arxo Law
language "law.core" version "0.2";
package demo.diagnostics version "0.1.0";
namespace "urn:law:demo:diagnostics";


entity Applicant;
relation resident(a: Applicant) kind empirical;
relation zone_bonus(a: Applicant) kind institutional;


external snapshot function zone_table(a: Applicant) -> Decimal {
    capability "demo-zones";
    snapshot_from context.zone_data;
}


rule ZoneBonus strict {
    for a: Applicant;
    when resident(a) and zone_table(a) >= 2;
    then zone_bonus(a);
}
lawtest
language "law.core" version "0.2";
package demo.diagnostics version "0.1.0";
namespace "urn:law:demo:diagnostics";


test "missing zone dataset" {
    given {
        context { legal_time @2026-03-01; decision_time @2026-03-01T09:00:00Z; knowledge_time @2026-03-01T09:00:00Z; timezone "UTC"; }
        assert resident(entity_ref("urn:demo:diagnostics:ann")) { origin case_input; }
    }
    evaluate truth(zone_bonus(entity_ref("urn:demo:diagnostics:ann")));
    expect evaluation_status == EXTERNAL_UNAVAILABLE;
}

The zone table should arrive as a pinned dataset, and this case pins none. The bonus question ends here.

What to do

Section titled “What to do”

Pin the exact dataset snapshot the function binding names and attach it to the case, then ask again. The pin must identify the data precisely — an unpinned or mismatched dataset is refused rather than read loosely.

Section titled “Related”

Documentation for Arxo. Writings — blog.arxo.io.

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