The following are the available task requests:

<task request>

──┬─<algolcheck request>──────┬────────────────────────────────────────┤
  ├─<archiveinfo request>─────┤
  ├─<areasummary request>─────┤
  ├─<attributes request>──────┤
  ├─<backup request>──────────┤
  ├─<cataloginfo request>─────┤
  ├─<checkerboard request>────┤
  ├─<codefileinfo request>────┤
  ├─<compatibility request>───┤
  ├─<copydeck request>────────┤
  ├─<defineoutput request>────┤
  ├─<filenames request>───────┤
  ├─<headercontents request>──┤
  ├─<incompatibility request>─┤
  ├─<namelist request>────────┤
  ├─<noreports request>───────┤
  ├─<structuremap request>────┤
  └─<tapedir request>─────────┘

The following subsections provide the syntax and explanations of the task requests. Various modifiers that can be used in task requests are explained under “FILEDATA Modifiers” later in this section.