docs/data/reusables/actions/reusable-workflow-calling-syntax.md

• {owner}/{repo}/.github/workflows/{filename}@{ref}{% ifversion fpt or ghec or ghes > 3.4 or ghae > 3.4 %} for reusable workflows in public {% ifversion ghes or ghec or ghae %}or internal{% endif %} repositories.
• ./.github/workflows/{filename} for reusable workflows in the same repository.{% endif %}

{ref} can be a SHA, a release tag, or a branch name. Using the commit SHA is the safest for stability and security. For more information, see "Security hardening for GitHub Actions." {% ifversion fpt or ghec or ghes > 3.4 or ghae > 3.4 %}If you use the second syntax option (without {owner}/{repo} and @{ref}) the called workflow is from the same commit as the caller workflow.{% endif %}