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Format file

As explained in Learn PowerShell Scripting in a Month of Lunches, Second Edition: Write and organize scripts and tools

A formatting view file is a PowerShell configuration file that defines how objects are displayed in formatted output.

A format file is an XML-based PowerShell configuration file that defines how selected object types appear in formatted output. Its views control presentation without changing the underlying objects or the tool’s data-gathering work. section 24.2.1 section 24.4

A view typically contains these building blocks:

  • A View name identifies the view, while ViewSelectedBy and TypeName associate it with an object type. section 24.2.1 section 24.2.3
  • TableControl, TableHeaders, TableRowEntries, and TableColumnItems define tabular output and map display columns to object properties. section 24.2.3
  • Labels can replace unwieldy property names, widths can control layout, and Alignment can right-align values such as numeric RAM or core counts. section 24.2.3
  • Keep the number of table column headers equal to the number of column entries; mismatches prevent the view from loading. section 24.2.3

Formatting machine information

A machine-information tool assigns objects the custom type name Toolmaking.MachineInfo. A corresponding view named MachineInfo displays ComputerName, OSVersion, Model, Cores, and RAM, with the numeric columns right-aligned. The module’s manifest specifies the format view alongside the .psm1 implementation.

How Learn PowerShell Scripting in a Month of Lunches, Second Edition: Write and organize scripts and tools covers it

How deep it goes
Explains XML structure, type selection, table columns, labels, widths, alignment, and column-count failures; it remains tutorial rather than comprehensive.
Examples
Uses Microsoft’s core format definitions, DiskInfo and MachineInfo table views, revised tool code, and a module manifest.
What it assumes
Assumes working PowerShell and object properties, while teaching the required XML structure and view elements from the beginning.
What you can do after
Build it from scratch by copying a table view, assigning a custom type name, mapping properties, and packaging the view with a module.
How it connects
Connects PowerShell formatting system with Format cmdlets, custom type names, XML, and module manifests.

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This explainer was generated by Manning's knowledge graph from the text of Learn PowerShell Scripting in a Month of Lunches, Second Edition: Write and organize scripts and tools. The section links point to the parts of the book it draws on.