Property types

Overview

Properties are fields you define on a tag. In the app, open Manage Properties on the tag, then edit its Tag Properties to add each property name and type.

After you apply the tag to a note, set property values inline in the note's properties panel. Those values can also appear in tag tables and Link DB Tables.

Alexandria supports exactly seven property types: boolean, select, multi-select, date, number, money, and string.

Types

Type	Stores	Example property	Example value
`boolean`	A true/false value.	`completed`	`true`
`select`	One selected text value.	`priority`	`high`
`multi-select`	Multiple selected text values.	`technologies`	`rust, react, typescript`
`date`	A date value.	`due_date`	`2025-08-15`
`number`	A numeric value.	`estimated_hours`	`8`
`money`	An exact decimal amount with a currency.	`budget`	`5000.00 EUR`
`string`	Free-form text.	`team`	`backend`

Defining property types on a tag

Open the tag, choose Manage Properties, and add entries under Tag Properties. For example, a Task tag might define:

completed as boolean
priority as select
labels as multi-select
due_date as date
estimated_hours as number
budget as money
description as string

When you add the Task tag to a note from the note's tags bar, those properties appear in the note's properties panel. Edit the values there inline.

From the CLI (optional)

You can also define the same tag properties and set values with akb:

akb create-tag "Task" \
  --properties "completed:boolean" \
  --properties "priority:select" \
  --properties "labels:multi-select" \
  --properties "due_date:date" \
  --properties "estimated_hours:number" \
  --properties "budget:money" \
  --properties "description:string"

akb tag "My Task" "Task"
akb set-property "My Task" "Task" "labels" "rust, docs"
akb set-property "My Task" "Task" "budget" "5000.00 EUR"

Money values

A money property stores an exact decimal amount together with its currency — it is never a plain number. This keeps amounts precise (no floating-point rounding) and always attached to a currency.

Amount: a decimal with up to 12 digits before the point and up to 6 after it (e.g. 0.10, 1234567.89). It is stored exactly, so currencies with no decimals (JPY), two decimals (EUR, USD) or three decimals (BHD) all work without losing precision.
Currency: three uppercase letters such as EUR, USD or JPY.

In the editor you fill in the amount and currency in separate fields. From the CLI you pass them together, for example set-property … "budget" "5000.00 EUR" (the currency may also come first, "EUR 5000.00").