<para>
The external representation of an interval is formed using one or two
- floating point numbers joined by the range operator (<literal>..</literal>
+ floating-point numbers joined by the range operator (<literal>..</literal>
or <literal>...</literal>). Alternatively, it can be specified as a
center point plus or minus a deviation.
Optional certainty indicators (<literal><</literal>,
- <literal>></literal> and <literal>~</literal>) can be stored as well.
+ <literal>></literal> or <literal>~</literal>) can be stored as well.
(Certainty indicators are ignored by all the built-in operators, however.)
- <xref linkend="seg-repr-table"> gives on overview over the allowed
+ <xref linkend="seg-repr-table"> gives an overview of allowed
representations; <xref linkend="seg-input-examples"> shows some
examples.
</para>