| :A: | Form of what string. |
| :B: | Branch number. |
| :BD: | Body. |
| :BF: | Branch flag. |
| :C: | Comments for delta. |
| :CB: | Ceiling boundary. |
| :D: | Date delta created (:Dy:/:Dm:/:Dd:). |
| :Dd: | Day delta created. |
| :Dg: | Deltas ignored (sequence number). |
| :DI: | Sequence number of deltas (:Dn:/:Dx:/:Dg:). |
| :DL: | Delta line statistics (:Li:/:Ld:/:Lu:). |
| :Dm: | Month delta created. |
| :Dn: | Deltas included (sequence number). |
| :DP: | Predecessor delta sequence number. |
| :Ds: | Default sid. |
| :DS: | Delta sequence number. |
| :Dt: | Delta information. |
| :DT: | Delta type. |
| :Dx: | Deltas excluded (sequence number). |
| :Dy: | Year delta created. |
| :F: | SCCS file name. |
| :FB: | Floor boundary. |
| :FD: | File descriptive text. |
| :FL: | Flag list. |
| :GB: | Gotten body. |
| :I: | SCCS ID string (sid) (:R:.:L:.:B:.:S:). |
| :J: | Joint edit flag. |
| :KF: | Keyword error/warning flag. |
| :KV: | Keyword validation string. |
| :L: | Level number. |
| :Ld: | Lines deleted by delta. |
| :Li: | Lines inserted by delta. |
| :LK: | Locked releases. |
| :Lu: | Lines unchanged by delta. |
| :M: | Module name. |
| :MF: | Modification validation flag. |
| :MP: | Modification validation program name. |
| :MR: | Modification numbers for delta. |
| :ND: | Null delta flag. |
| :P: | Username of programmer who created delta. |
| :PN: | SCCS file pathname. |
| :Q: | User-defined keyword. |
| :R: | Release number. |
| :S: | Sequence number. |
| :T: | Time delta created (:Th:::Tm:::Ts:.). |
| :Th: | Hour delta created. |
| :Tm: | Minutes delta created. |
| :Ts: | Seconds delta created. |
| :UN: | User names. |
| :W: | Form of what string. |
| :Y: | Module type flag. |
| :Z: | what string delimiter. |
