| cap | No | Maximum body characters allowed in the window. | |
| date | No | Document date in ISO 8601 format (YYYY-MM-DD). | |
| error | No | Present when the call failed. Absent on success. | |
| shown | No | Number of body characters returned. | |
| title | No | Document title in the requested language (absent for some older works and judgments). | |
| notice | No | How to retrieve the remaining document content. | |
| content | No | Body content of the act in the requested format and language. In "paged" mode this is the requested window; in "full" mode it starts at zero and is capped at 100000 characters. Omitted in "metadata_only" mode, when the window is empty, or when content is unavailable. | |
| outline | No | Structural outline of the act. Present only when outline is true; an empty array means no structure was detected. | |
| has_more | No | True when body content exists beyond the returned window. Continue in "paged" mode with offset = content_offset + content_chars_returned until false. Always false in "metadata_only" mode. | |
| in_force | No | Whether the act is currently in force. | |
| language | No | Language code of the returned content. | |
| work_uri | No | CELLAR work URI. | |
| selection | No | Outcome of a structural selection. Present only when select was used; content holds the matched sections joined in document order. | |
| truncated | No | True when the returned body window was capped. | |
| legal_basis | No | Legal basis acts for this work. | |
| celex_number | No | Confirmed CELEX number for the retrieved work. | |
| content_mode | No | Content mode applied to this response: "metadata_only", "paged", or "full". | |
| is_superseded | No | True when a newer consolidated version of the requested base act exists (an unofficial reading aid merging later amendments), so the returned text may not include those amendments. Not a repeal/replacement signal — the base act remains the law and may still be in force (see in_force). Absent when the act has no consolidated version, or is itself one. | |
| resource_type | No | Human-readable document type label (e.g. "Regulation", "Directive"). Absent for some older works. | |
| content_format | No | Format of the returned content: "html", "markdown", or "xml". | |
| content_offset | No | Character offset where the returned content window begins. Present when a body was fetched and available. | |
| content_status | No | Body resolution status: "not_requested" for metadata-only calls, "available" when a body was resolved, or "unavailable" after ordinary resolution attempts returned no usable body. | |
| requested_celex | No | The originally requested CELEX, echoed when resolve "current_consolidated" served a different (consolidated) work. celex_number holds the CELEX actually served. Absent when the served work is the one requested. | |
| eurovoc_subjects | No | EuroVoc subject classifications. | |
| content_available | No | Whether body content was fetched from EUR-Lex. False in "metadata_only" mode (no fetch attempted) — use content_mode to distinguish "not requested" from "unavailable upstream". | |
| language_fallback | No | Human-readable note explaining the fallback that occurred (e.g. "Requested FR content unavailable; returned EN"). Present only when a fallback happened. | |
| author_institution | No | Human-readable name of the primary (first) originating EU institution (e.g. "European Parliament", "Council of the EU"). For co-legislated acts, prefer author_institutions for the complete set. Absent when not recorded. | |
| consolidated_as_of | No | Consolidation date of current_consolidated_celex in ISO 8601 (YYYY-MM-DD). Present only when is_superseded is true. | |
| requested_language | No | Originally requested language code when English fallback changed the effective language reported in language. | |
| structure_detected | No | Whether any act structure was parsed from the body. Present when outline or select was used; false means no detectable chapter/article/annex structure — read it via offset/limit or content_mode "full". | |
| author_institutions | No | All originating EU institutions, for co-legislated acts adopted by more than one body (e.g. ["European Parliament", "Council of the EU"]). Absent when none recorded. | |
| content_chars_total | No | Total character length of the full document body. Present when content was fetched and available; use with content_offset to page through the entire act. | |
| content_chars_returned | No | Number of body characters returned in this response (equals content length). Present when a body was fetched and available. | |
| current_consolidated_celex | No | CELEX of the newest consolidated version of the requested base act (e.g. 02014R0833-20260424) — fetch it with eurlex_get_document, or pass resolve "current_consolidated". Present only when is_superseded is true. | |
| content_unavailability_reason | No | Why content_status is "unavailable": no representation exists, the upstream request failed, or a multipart Formex body could not be assembled completely. | |