Table numbers are characterized by a uniform thickness - usually a half-square - (or the possibility of designing them with the same thickness ) and uniform front and rear width ( meat ). They are therefore equivalent ( equidistant ) numeric representations. This makes them more suitable for tables in which numbers should be right-aligned below one another. The number 1 is particularly problematic here , as it takes up significantly less space, but also uses the same width as the remaining numbers. The English name is Tabular Figures .
Half-square digits have a spatial extension of half a square in width (if the font size is 10 pt, the digit has a thickness of 5 pt). Due to the fixed width of each character ( non-proportional font ) and thus better clarity, they are mainly used for setting columns of numbers or tables with rows of numbers.
Implementation in computer systems
<span style="font-family:monospace">0123456789</span>or simply
The digits have simple ASCII coding (U + 0030 – U + 0039).
The property "table number" is referred to in Unicode with the expression MATHEMATICAL MONOSPACE DIGIT. In the Unicode block mathematical alphanumeric symbols are defined at the positions
1D7FFthe digits 0–9.
In the unicode block half-width and full-width forms there is another variety. Here, among other things, western numerals are offered in half and full width - however, this is used to embed Asian characters and takes their style and width. Fonts with these encodings are not to be expected on European computers; their use is not to be expected.
According to the English tabular figures , suitable fonts are usually identified by the abbreviation TF, corresponding OpenType fonts contain the various digit forms. It is important to distinguish between fonts that the ASCII positions
39contain correspondingly shaped figures, and those in which they are at the points
1D7FFare located, while at
39the usual proportional figures are.
Use on your own system is unproblematic. However, if a document is to be displayed somewhere else, it must be assumed that fonts and encodings are not defined there, so that the numbers cannot be read.
- The fonts are to be embedded in PDF documents.
- The typographical table number is unsuitable for websites; the codes 1D7F6-1D7FF will regularly be illegible to the unknown reader. Typewriter font should be used here.
The figure dash , U + 2012, belongs in the context of the table numbers . In German-language typography, it is only permitted in the context of the same-headed number representation described here; in the Anglo-American area it is also used for the notation of telephone numbers.
In this way, in the context of tables, the numbers can be arranged with the same thickness; However, full stop and comma are missing.
- Robert Bringhurst: The Elements of Typographic Style. Hartley & Marks. Point Roberts / Vancouver 2005, ISBN 978-0-88179-206-5 (English).
- Friedrich Forssman , Ralf de Jong: Detailed typography. Hermann Schmidt, Mainz 2004, ISBN 978-3-87439-642-4 .