G.3 Depend
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## G.3 Depend

The `<depend>` tag selects files whose last modified date is later than another, equivalent file in another location.

The `<depend>` tag supports the use of a contained Appendix F, Core mappers element to define the location of the file to be compared against. If no `mapper` element is specified, the identity type mapper is used.

The `<depend>` tag is case-sensitive.

    <fileset dir="phing-2.4.5/classes" includes="**/*.php">
      <depend targetdir="phing-2.4.6/classes"/>
    </fileset>

Table G.3: Attributes for the `<depend>` selector

Name | Description | Default | Required
--- | --- | --- | ---
`targetdir` | The base directory to look for the files to compare against. The precise location depends on a combination of this attribute and the `mapper` element, if any. | n/a | Yes
`granularity` | The number of milliseconds leeway to give before deciding a file is out of date. This is needed because not every file system supports tracking the last modified time to the millisecond level. | 0 | No

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