When premises change hands, the two sides walk the floor together and write down what is not finished. This is the sheet that walk produces. A plan of the floor comes first, with every defect marked where it sits; then the same defects one to a line, each with its room, what was found, how badly it stands in the way, the trade that answers for it and the date it is to be made good by; then three tables saying what the nine come to, gathered by degree, by room and by trade. Not a figure on it is typed in. A room's area is the rectangle the plan shows it as, read at the scale the plan is set to; a share is a count against the nine; a date is the handover plus the days that degree is given. Find a tenth defect and the plan, the list and the three tables all move together.
The marks on the plan are what sets this sheet apart from every other example here, and it is worth opening the file to see why. They are annotations: they stand above the page instead of inside what the page draws. Reading software therefore lists them on their own, one line per mark, and lets a reader jump to one, hide them all, or print the plan without them — and the plan underneath is the same plan either way. Five shapes are used, one for each way a defect shows itself: a cloud round a patch that is wholly under reserve, a ring on a defect that sits at one point, an arrow whose head rests on what the note is about, an outline round a defect that spreads over an area, and a run along one that follows a line. Each mark carries the words of its own line in the list, so what reading software speaks aloud is the sentence the list prints.
Nothing is left out and nothing is simplified: this is the program exactly as it runs, for the developer who uses this library. The third is the description itself: a plain list of what the page has to say, which is what the service is sent.
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An invoice: each billed line follows the one before, the totals sit under the last, and the QR code holds the transfer. The customer points a telephone at it, and the banking app offers the exact sum into the exact account, with nothing retyped.
The note that travels with the goods: a barcode against each article, a box the receiver ticks, and the consignment's own code.
A payslip: eighteen contribution lines, with the employee's share and the employer's, and for each the month's amount then the total since January. Each figure is tied to the line and the column it stands under, for software that reads the page aloud.
A services agreement over two pages where no clause is ever cut in half by a page turn, ending in signature, name and date fields filled in on screen.
A certificate whose border, ribbon and seal are drawn as lines rather than photographed: sharp at any size, and a fraction of the weight.
A boarding pass carrying, as a QR code, the one line the gates at an airport read — one character out of place and it is refused.