A card's properties are typed fields beside it: a date, an amount, a name. Any key of up to 40 lowercase
letters, digits and underscores is allowed, and nothing checks a value against this page. It is a
recommendation, so that two apps describing the same thing use the same name: a processor for law and a plugin
for Obsidian that both write filed_on can be filtered together, and one that writes filing_date cannot.
Each key below is one Caute or a processor Axionary runs already writes, with the type it is written as. A
value written as another type is still kept, but a filter such as due:lt:2026-12-01 compares dates only with
dates.
The types are text, number, date (YYYY-MM-DD), url and list (of text). When a value is sent without
a type, Caute reads one from it: a number is a number, a list a list, YYYY-MM-DD a date, an address
starting https:// a url, and anything else text.
Conversations and memory
| Key |
Type |
Meaning |
assistant |
text |
The assistant a conversation or memory came from, in lowercase: claude, chatgpt, gemini, or a connected app's name. |
model |
text |
The model the assistant named on the page, as it wrote it. |
conversation_url |
url |
The conversation's own address on the assistant's site. |
task |
text |
On a checkpoint note, the task it is for, as the person calls it; Caute writes it from the checkpoint call. |
caught_from |
text |
How it reached Caute: extension for the browser extension, import for a paste or an export, agent for a page an assistant read on the person's behalf and saved with its task. Caute writes it; it is never a value an app chooses. |
as_of |
date |
The date the card's facts are true as of, when that is not the day they were written down. |
Sources an answer cited
| Key |
Type |
Meaning |
cited_by |
url |
The address of the conversation that cited this page. |
cited_on |
date |
The day it was cited. |
Papers (the DOI finder)
| Key |
Type |
Meaning |
doi |
text |
The paper's DOI, lowercase, without https://doi.org/. |
title |
text |
The paper's title as its record gives it, which may differ from the card's own title. |
authors |
list |
The authors' names, in the record's order. |
year |
number |
The year it was published. |
venue |
text |
The journal, conference or publisher. |
Money (the receipt reader)
| Key |
Type |
Meaning |
vendor |
text |
The business that was paid, not the payment service that handled it. |
amount |
number |
The total charged or due, tax included. Written only with currency. |
currency |
text |
Its currency, as an ISO 4217 code: USD, EUR, GBP. |
tax |
number |
The tax included in amount. |
receipt_date |
date |
The date of the purchase or the invoice. |
expense_category |
text |
One of travel, meals, groceries, software, office, shopping, utilities, health, education, entertainment or other. |
Dates you need to act on (the deadline finder)
| Key |
Type |
Meaning |
due |
date |
When a bill or a payment is due. |
renews |
date |
When a subscription or a policy renews. |
expires |
date |
When a card, a warranty or an offer expires. |
What the team agreed
On a decision note in a team's shared space, written by Caute from the team's agreement. Nobody sets them, an
app with properties:write included; review_on alone is given when the decision is proposed.
| Key |
Type |
Meaning |
status |
text |
proposed, agreed or superseded. |
decided_on |
date |
The day it was agreed, by the last of the people the team's owner named. |
decided_by |
text |
Who agreed it last, by name. |
superseded_on |
date |
The day a replacement was agreed, on the decision it replaced. |
review_on |
date |
When the team means to look at it again. |
Naming a new key
Use an existing key when it means the same thing. Otherwise: lowercase words joined by _; a date ends in
_on (filed_on, decided_on) or names the event (due, expires); an amount names what it counts and puts
its currency in a key of its own. Keep one meaning per key, so a filter on it means one thing.
