# dag > Every PAG keyword record, with what grounds it and how it is checked. Page: Ontology · Grammar Canonical: https://banes-lab.com/ontology/grammar#pag-keywords-dag Listed in [Ontology · Grammar](https://banes-lab.com/api/pages/ontology/grammar.md), after [state_machine](https://banes-lab.com/ontology/grammar/pag-keywords-state-machine.md) and before [priority_queue](https://banes-lab.com/ontology/grammar/pag-keywords-priority-queue.md). Every PAG keyword record, with what grounds it and how it is checked. ### DAG Details Meaning Graph declaration · makes a dependency graph explicit; the loop spine is one Example DAG pipeline: Grounds [representation:graph](https://banes-lab.com/records/reasoning/representation-graph.md), [invariant:epi-declared-dependency](https://banes-lab.com/records/reasoning/invariant-epi-declared-dependency.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ### NODE Details Meaning Node definition Example NODE build: Grounds [representation:graph](https://banes-lab.com/records/reasoning/representation-graph.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ### DEPENDS_ON Details Meaning Dependencies · declared by the referent, never inferred from a name Example DEPENDS_ON [a, b] Grounds [invariant:epi-declared-dependency](https://banes-lab.com/records/reasoning/invariant-epi-declared-dependency.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ### AFTER Details Meaning Sequencing Example AFTER compile Grounds [representation:graph](https://banes-lab.com/records/reasoning/representation-graph.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ### BEFORE Details Meaning Reverse sequencing Example BEFORE deploy Grounds [representation:graph](https://banes-lab.com/records/reasoning/representation-graph.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ### PARALLEL_GROUP Details Meaning Parallel nodes · peers with no edge between them Example PARALLEL_GROUP: a, b Grounds [representation:graph](https://banes-lab.com/records/reasoning/representation-graph.md) How it is checked Checked by a structured-document validator that parses each document against the grammar and reports every defect by its shape Population Every agent and template document the validator walks, and every occurrence of the keyword in them Freshness A verdict stands until the grammar data or a document that uses the keyword changes Refusal The validation stage fails the gate on any defect code, so a document with a malformed keyword does not ship Observation None, because a keyword is static text in a document, and nothing observes it while a run executes Evidence Watched to fire and to accept: a suite plants a retired head in a real template and validates every agent and template on disk clean Authoritative side The grammar data, which every keyword in a document conforms to Depends on Not answered Shape it refuses Not answered ## Links to - [Graph](https://banes-lab.com/records/reasoning/representation-graph.md) - [Declared Dependency](https://banes-lab.com/records/reasoning/invariant-epi-declared-dependency.md)