[siwapp_property]

Stores configuration properties that user modified.
  - Default configuration values are located in app.yml
  - When user logs into the application basic configuration is saved into user session.

Example:

  |-----------------------------|-----|---------------------|----------------------|
  | KEY                         | VAL | TYPE                | ATTRIBUTES           |
  |-----------------------------|-----|---------------------|----------------------|
  | iva16                       | 16  | tax                 | name=IVA 16%&default |
  | iva7                        |  7  | tax                 | name=IVA 7%          |
  | iva4                        |  4  | tax                 | name=IVA 4%          |
  | invoice_series_prefix       | MH- | conf                | pad:5&char:0         |
  | invoice_series_first_number |  0  | conf                |                      |
  | ...                         | ... | ...                 | ...                  |
  | pet_name                    | dan | custom_client_field | type:text            |
  |-----------------------------|-----|---------------------|----------------------|

*** See ./property_list.txt ***

[invoice]

  - id: internal identification (ej. 1)
  - number:
    + $invoice_series_prefix . ($invoice_series_first + $id) = "MH-00001"
    + $rectification_invoice_series_prefix . ($rectification_invoice_series_first + $id) = "MH-00001"
  - type: invoice, rectification
  - shipping and invoicing address
  - client name, phone and email
  - contact person
  - invoice description
  - invoice dates: issue and due date
  - invoice status: draft, opened (default), closed. If invoice status is set to draft, invoice_number will be set to null.
  - creation and update dates
  - indexes are used in autocompletion

[invoice_item]

These are the concepts of the invoices.

[recurrent_invoice]

A recurrent invoice is an invoice template.
When you configure it, it is saved as draft until you release the first invoice.
When you do so, $last_publishing_date is updated and a new invoice is released with current date.
Periodically ($period days) a new invoice is generated with "opened" $invoice_status.
Once activated, draft status disappear in edit view, but you can "freeze" invoice generation at any moment.

  - template_status: draft | active (default) | frozen

[rectification_invoice]

Se diferencia de las facturas normales en que no tienen 'due_date' y que type=rectification