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;doc: journal: clarify account type auto detection, again

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@ -2799,12 +2799,11 @@ but typically not investments or receivables.)
To make the [balancesheet]/[balancesheetequity]/[cashflow]/[incomestatement] reports work,
generally you should declare your top-level accounts, and their types.
For each top-level account, write an [account directive](#declaring-accounts),
with a `type:` [tags](#tags). The tag's value can be any of
with a `type:` [tag](#tags). The tag's value can be any of
`Asset`, `Liability`, `Equity`, `Revenue`, `Expense`, `Cash`,
or (for short) `A`, `L`, `E`, `R`, `X`, `C`, all case insensitive.
The account's type is inherited by all subaccounts, unless they declare a different type.
An example:
or (for short) `A`, `L`, `E`, `R`, `X`, `C` (case insensitive).
An account's type is inherited by its subaccounts, unless they declare a different type.
Here's an example, declaring all six account types:
```journal
account assets ; type: Asset
@ -2816,10 +2815,24 @@ account revenues ; type: Revenue
account expenses ; type: Expense
```
There is also an older syntax, which is deprecated and will be dropped soon
(A, L, E, R or X separated from the account name by two or more spaces):
```journal
account assets A
account liabilities L
account equity E
account revenues R
account expenses X
```
#### Auto-detected account types
As a fallback, when account types are not declared, hledger guesses them
by looking for some common english top-level account names:
hledger tries to find at least one top level account in each of the
six account types (Asset, Liability, Equity, Revenue, Expense, Cash).
When no accounts have been declared for a particular type,
hledger tries to auto-detect some accounts by name,
using [regular expressions](#regular-expressions):
<!-- monospace to work around https://github.com/simonmichael/hledger/issues/1573 -->
```
@ -2834,43 +2847,32 @@ by looking for some common english top-level account names:
^expenses?(:|$) | Expense
```
For each type, any declaration of an account as that type will disable auto-detection of that type.
For people using standard english account names,
this feature helps hledger's [high-level reports](#declaring-account-types) work out of the box with minimal configuration.
This feature helps hledger's high-level reports work out of the box, for new users using english account names.
However, explicit account declarations are usually better in the long run,
for clarity, predictability, and the other features described here.
If you use non-english account names,
you should [declare account types](#declaring-account-types) to make these reports work.
And more generally, declaring accounts and types is usually a good idea,
for increased clarity and predictability
(and for the other benefits of account directives: error checking, display order, etc).
#### Interference from auto-detected account types
Notes:
If you assign any account type, it's a good idea to assign all of
them, to prevent any confusion from mixing declared and auto-detected
types. Although it's unlikely to happen in real life, here's an
example: with the following journal, `balancesheetequity` shows
"liabilities" in both Liabilities and Equity sections. Declaring another
account as `type:Liability` would fix it:
- When any account is declared as some type, this disables auto-detection for that particular type.
- If you declare any account's type, it's a good idea to declare
an account for all six types, since a mix of declared and auto-detected
types can cause confusion.
For example, here liabilities is declared to be Equity, but would also
be auto-detected as Liability, since no Liability account is declared:
```journal
account liabilities ; type:Equity
```journal
account liabilities ; type:Equity
2020-01-01
assets 1
liabilities 1
equity -2
```
#### Old account type syntax
In some hledger journals you might instead see this old syntax (the
letters ALERX, separated from the account name by two or more spaces);
this is deprecated and may be removed soon:
```journal
account assets A
account liabilities L
account equity E
account revenues R
account expenses X
```
2020-01-01
assets 1
liabilities 1
equity -2
```
### Account display order