A custom format is used for the output of objects. The value of a custom format is the method name evaluated upon the object to be inserted. The method should return an object that, when converted to a string, yields the desired text. For example, the DTML source text:
inserts the result of calling the method, DayOfWeek, with the value of the variable date . As the example suggests, the most common use of custom formats in Zope is in the output of date-time data. The appendix A provides a summary of the custom formats available for date-time data.
In addition to custom formats, a few special formats are defined by the var tag that can be used with the fmt attribute. These are summarized in table 16.
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Show a numeric value with a dollar symbol and two decimal places. |
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In addition to custom and special formats, C11-style formats may also be used. A C-style format consists of text containing a single conversion specification. A conversion specification consists of a percent sign, optionally followed by a flag, a field width, a precision value, and a conversion specifier. A description of C-style formats is beyond the scope of this document. For details on C-style formats, see a C-language reference manual. Not all conversion specifiers are supported by DTML. Table 17 summarizes the conversion specifiers that DTML does support.