# `Trellis.DefinitionSummary`
[🔗](https://github.com/salesforce-misc/trellis/blob/v0.1.0-alpha/clients/elixir/lib/trellis/definition_summary.ex#L1)

A registered transform definition, as `Trellis.definitions/1` lists it.

`target_table` is fully qualified (`schema.table`) and identifies the
transform. `created_at` is when it was registered.
`backfill_failure` is set while its build keeps failing, as in
`Trellis.Status`. `halt` is set while the drain, or its build's merge,
has halted on it: a `Trellis.CaptureFailure` of kind `:halt`, the
definition `:paused` until the cause is fixed and it is resumed. Listing
the definitions and looking for a `halt` is the health check for halts.

# `t`

```elixir
@type t() :: %Trellis.DefinitionSummary{
  backfill_failure: Trellis.BackfillFailure.t() | nil,
  created_at: DateTime.t(),
  halt: Trellis.CaptureFailure.t() | nil,
  status: Trellis.Status.status(),
  target_table: String.t()
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*