Text Placeholders

A placeholder replacer fills named values in text and applies filters to them. This chapter covers the replacement workflow, built-in sources and filters, application providers, and syntax choices. Start with Text Placeholders Overview to find the topic you need.

• Text Placeholders Overview
• Completing Text with Placeholders
  • Placeholder Expression Syntax
  • Registering Sources and Replacing Placeholders
  • Variable and Environment Placeholder Sources
  • Filter Chains and Literal Replacement Values
  • Strict and Tolerant Replacement and Validation
• Using Built-in Placeholder Sources
  • Reading the Process Environment
  • Supplying Application Values
• Transforming Placeholder Text with Built-in Filters
  • Enabling the Filter Set
  • Reading Filter Parameters
  • Cleaning and Selecting Text
  • Escaping, Choosing, and Validating
• Providing Your Own Placeholder Values and Filters
  • Implementing a Custom Placeholder Source
  • Implementing a Custom Placeholder Filter
  • Source and Filter Error Categories and Diagnostics
• Choosing Placeholder Syntax for Your Text
  • Opening and Closing Placeholder Delimiters
  • Filter Separators and Disabled Filter Chains
  • Name and Parameter Separators
  • Escaping Literal Placeholder Delimiters
  • Strict and Tolerant Placeholder Replacement
  • Single and Repeated Replacement Passes
  • Escaping Replacement Values and Parsing Layers