The BS1192 - AUG Version 2 layer standard contains the following fields:
| Field | Description |
|---|---|
| Discipline | Identifies the author of the layer by using a single character. For example, A for architect, S for structural engineer. This field is required. |
| Category | Identifies the building element by using three digits and uses CISfB as a common referencing system. For example, 210 for wall, 315 for door. This field is required. |
| Graphics | Indicates information that is associated with the category by using a single character. For example, D for dimension, G for graphics, T for text. This field is required. |
| Grade | Expresses as a single digit the recommended line thickness, where 1 is the thinnest and 9 is the thickest. This field applies mostly when using text where ISO standard pen thicknesses correlate with ISO standard text heights. For example, text that is 2.5mm high that is drawn with a 0.25mm pen is given a pen grade of 2. This field is required. |
| Level | Differentiates viewing planes in plan, section, or elevation view by using a two-digit alphanumeric character. For example, 01 would be Level/Floor 1, EA the elevation, and SA Section A. This field is optional. |
| Status | Indicates the state of work by using a single character. For example, N indicates new, R indicates to be removed. This field is optional. |
| Scale | Indicates the level of detail to be shown by using a single character. For example, P indicates a planning level, D indicates a detail. This field is optional. |
| Phase/Time | Indicates phasing or alternatives by using a single character. |
| User | Specifies the user. It is not a fixed width field but is separated from the rest of the layer name with an underscore. For example, A210G701_WALL_L1. This field is optional. |
The following table lists the rules for the BS1192 - AUG Version 2 Layer Standard:
| Field | Optional | Width | Fixed | Wildcard | Match | Delimiter | Default | |
|---|---|---|---|---|---|---|---|---|
| Discipline | No | 1 | Yes | [0A-Z] | No | None | A | |
| CSIfB | CISfB-A | No | 1 | Yes | # | No | None | 1 |
| CISfB-B | No | 1 | Yes | # | No | None | 0 | |
| CISfB-C | No | 1 | Yes | # | No | None | 0 | |
| Graphics | No | 1 | Yes | [0ACDGHTZ] | No | None | G | |
| Grade | No | 1 | Yes | # | No | None | 7 | |
| Level | Yes | 2 | Yes | [0-9A-Z][0-9A-Z] | No | None | 00 | |
| Status | Yes | 1 | Yes | [0NXR] | No | None | 0 | |
| Scale | Yes | 1 | Yes | [0ASPD] | No | None | 0 | |
| Phase | Yes | 1 | Yes | [0-9A-Z] | No | None | 0 |