vertical at 0', horizontal at 30'.
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grid A vertical at 0'
vertical at 0', horizontal at 30'.
| Word | Accepts | Required | Meaning |
|---|---|---|---|
axisvertical | vertical · horizontal | instance · required | which way the line runs — the head’s axis word, written bare after the id |
atat 30' | plane (normal x) or plane (normal y) | instance · required | the line’s station on the axis it is normal to — an x station for a vertical grid, a y station for a horizontal one |
labellabel "A.5" | text | instance · optional | what the bubble prints when it is not the id — the id stays dot-free, the bubble says A.5 |
| Datum | Shape | Status | Resolution | Rule |
|---|---|---|---|---|
| (the grid line) | plane | core | intrinsic | The gridline itself — a declared datum, no selection — referenced as grid.<id>: (grid.A, grid.2 - 4'), past grid.A, along grid.A. Normal x̂ for a vertical grid, ŷ for a horizontal one. |