--- title: "Format String" slug: "format-string" updated: 2026-07-26T15:48:34Z published: 2026-07-26T15:48:34Z canonical: "help.idibilling.com/format-string" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.idibilling.com/llms.txt > Use this file to discover all available pages before exploring further. # Format String The method in which the attribute type is formatted. For example, some telephone number fields may be formatted as (xxx)xxx_xxxx. > [!NOTE] > Note > > The Format String for Attribute Objects and Reference Objects is a read-only field. See also: [About Format Strings](/v1/docs/about-format-strings)