Conceptual

How to Use Mail Merge in Pages on macOS using Contacts and Numbers Spreadsheets for Envelopes

The core principle is a data-driven template instantiation mechanism where static document layouts dynamically populate variable fields based on external structured datasets (relational contact records or relational spreadsheet tables). This theory defines the abstract rule that any persistent field within a word processing layout can be mapped to specific columns in an upstream data source, facilitating batch generation of distinct instances from a single master design. The concept belongs to the domain of automated document production and falls under the parent discipline of office automation systems, extending traditional static typesetting into programmable mass customization workflows.