Placeholder Definitions

The Placeholder Definitions table explains what each placeholder means and how it should be filled.

It is the central place for placeholder rules used across Airtable templates.

Important Columns

Column	What it means
Placeholder Key	The key used inside templates, without {{ }}.
Type	How the placeholder is resolved.
Source Scope	Helper grouping for editors.
Source Field Label	Human-readable source field name.
Source Field ID	Technical Airtable field ID used by data placeholders.
Display Strategy	How multiple data values are shown.
Display Text	Unit text for unit placeholders or visible link text for link placeholders.
Entity Type	Used by entity-link-token placeholders.

Placeholder Types

• Data placeholders
• Unit placeholders
• Link placeholders

The supported placeholder types are:

• data
• unit
• entity-link-token

How To Use This Table

• Do not include braces in Placeholder Key.
• Use kebab-case for placeholder keys.
• Data placeholders rely on Source Field ID.
• Unit placeholders rely on Display Text.
• Link placeholders rely on Entity Type and Display Text.
• Use the type-specific pages below when you need more detail about how each placeholder type is used.

note

Placeholder definitions store the normal key only, without any modifier.

Example:

• Placeholder Key: sampling-mode-analog-out
• Template usage: {{sampling-mode-analog-out | lower-first}}
• Template usage: {{voltage-range-analog-in | underline}}

tip

If you are unsure which placeholder to use, start from the row you are editing and check which value type it needs: data, unit, or link.