How to compile the backbone and content of engineering data files?

File backup items have file numbers and file titles, which shall be filled in by the preservation unit; The backbone of the engineering archives should be filled in by the urban construction archives. Compilation of contents in the engineering data volume: (1) The contents filled in should be consistent with the contents of the case file, arranged behind the inner page, and cannot replace the contents of the original documents and design drawings. (2) Compilation unit: file compilation unit. (3) Serial number: according to the arrangement of documents in the volume, it is marked with Arabic numerals from L in turn. (4) Data name: that is, the names of tables and drawings. For documents without titles or corresponding tables, titles should be written according to the contents. (5) Data number: table number and drawing number. (6) Information content: the summary content of information. (7) Compilation date: the formation date of the data (the written material is the formation date of the original document, the summary table is the summary date, and the as-built drawing is the compilation date). (8) Page number: fill in the page number or starting and ending page number of each document. (9) Remarks: Fill in the questions that need to be explained.