In ODF 1.2 part 1 CD03, section 18.470 style:condition, there is a list preceded by:
"The defined variables for paragraph and table cell style conditions are:"
The description of the list is not correct. The terms like "value", "numberValue" or "string" are not variables, but just symbols that are used in the preceding expressions that are described there.Further, these symbols are only used in the expressions for table cell styles.