// THE NUMBERS
COUNTED,NEVER TYPED.
Every figure on this page is read from the engine's own stores as the page is drawn. A tax site whose published figures are last year's is worse than no site at all, so this page cannot hold a copy.
// WHAT THE ENGINE HOLDS
The rule base, the shelves, the readers
183rules in the engine
69rules checked against the Act or a SARS guide
562expense items mapped
155life events the questions key off
91SARS return fields mapped
22 548suppliers shelved
23 130supplier aliases matched
2 180merchants in the DNA pull
61document types recognised
ⓘ"Checked" means a person re-read the Act or the SARS guide the rule cites and countersigned it. Every rule cites its source; the countersign desk records who re-read it and when. A rule that has not been countersigned is shown to a practitioner as needing confirmation and is never counted in a figure put in front of a taxpayer.
// INSIDE THE KNOWLEDGE BASE
Every table, its row count
| Store | Rows | What it is |
|---|---|---|
| rules | 183 | Rules, one per provision the engine applies |
| expenses | 562 | Expense items, the things people actually buy |
| verified | 69 | Rules checked against the Act or a SARS guide |
| life_events | 155 | Life events the questionnaire keys off |
| questions | 89 | Questions the engine can ask |
| evidence | 86 | Evidence types a rule can demand |
| sars_fields | 91 | SARS return fields mapped |
| formulas | 37 | Formulas, computed rather than remembered |
| constants | 119 | Tax constants, by year |
| notes | 94 | Notes on rules |
| links | 268 | Rule to life event links |
| dependencies | 92 | Rule dependencies |
| writeoffs | 175 | IN47 asset write-off classes |
| suppliers.sectors | 22 | Supplier database |
| suppliers.subsectors | 131 | Supplier database |
| suppliers.tax_rows | 131 | Supplier database |
| suppliers.verified | 0 | Supplier database |
| suppliers.suppliers | 22 548 | Supplier database |
| suppliers.aliases | 23 130 | Supplier database |
| suppliers.keywords | 512 | Supplier database |
| suppliers.mixed | 45 | Supplier database |
// SARS RATES AND THRESHOLDS
The tables the engine computes against
Brackets, rebates, thresholds and medical credits, by tax year, read out of the same table the calculator uses, with any year a person has not signed off labelled as unconfirmed.