SAXONICA |

The unary minus operator changes the sign of a number. For example `-1`

is minus one, and
`-0e0`

is the double value negative zero.

Unary plus has very little effect: the value of `+1`

is the same as the value of `1`

.
It does, however, provide a quick way of forcing untyped values to be numeric, for example you can write
`<xsl:sort select="+@price"/>`

to force a numeric sort, if you find
`<xsl:sort select="number(@price)"/>`

too verbose for your tastes.