DAXP Frame Example — Single Message with Nested Collection (2050)

DAXP|V=0.7beta|EN=UTF-8|CX=CRM|
$:1=CRM.DATA|$:3=3|
$:4=1|$:5=I|$:6=2000|2001=1|2002=Robert|2003=Homa|2004=This email address is being protected from spambots. You need JavaScript enabled to view it.|2005^N|2006^N|2007^N|2050@2;3|
$:4=2|$:5=V|$:6=2050|3201=3|2001=1|3202=4000|3203=2345678767|3205^N|$:132=2345678767|
$:4=3|$:5=V|$:6=2050|3201=2|2001=1|3202=2000|3203=1234567876|3205^N|$:132=1234567876|
$:9=28|

1. Preamble

DAXP|V=0.7beta|EN=UTF-8|CX=CRM|

The preamble applies to the entire frame.

$:1=CRM.DATA|$:3=3|

Tag	Name	Value	Description
$:1	Message type	CRM.DATA	Customer data message
$:3	Block quantity	3	Number of blocks contained in the message

The frame contains exactly one message: CRM.DATA.

The message body contains three blocks.

Tag	Name	Value	Description
$:4	Block counter	1	First block in the message
$:5	Block type	I	Instance — one occurrence of an entity
$:6	Entity identifier	2000	CUSTOMER entity

Tag	Field	Value / operation	Description
2001	customerId	1	Customer identifier
2002	name	Robert	Customer name
2003	surname	Homa	Customer surname
2004	email	This email address is being protected from spambots. You need JavaScript enabled to view it.	Customer email address
2005	town	^N	Field is explicitly set to NULL
2006	telephone	^N	Field is explicitly set to NULL
2007	type	^N	Field is explicitly set to NULL
2050	contractMap	@2;3	Reference to nested blocks 2 and 3

The expression:

means that field 2050, named contractMap, references blocks 2 and 3.

The @ operator is a reference operator.

$:4=2|$:5=V|$:6=2050| 3201=3| 2001=1| 3202=4000| 3203=2345678767| 3205^N| $:132=2345678767|

Tag	Name	Value	Description
$:4	Block counter	2	Second block in the message
$:5	Block type	V	Value — an element of a collection
$:6	Collection identifier	2050	contractMap collection

Collection 2050 contains elements based on entity 3000.

Tag	Field	Value / operation	Description
3201	id	3	Contract identifier
2001	customerId	1	Identifier of the owning customer
3202	amount	4000	Contract amount
3203	contractNo	2345678767	Contract number
3205	status	^N	Contract status is explicitly set to NULL
$:132	Block identity	2345678767	Identity or reference value of the collection element

$:4=3|$:5=V|$:6=2050| 3201=2| 2001=1| 3202=2000| 3203=1234567876| 3205^N| $:132=1234567876|

Tag	Name	Value	Description
$:4	Block counter	3	Third block in the message
$:5	Block type	V	Value — an element of a collection
$:6	Collection identifier	2050	contractMap collection

Tag	Field	Value / operation	Description
3201	id	2	Contract identifier
2001	customerId	1	Identifier of the owning customer
3202	amount	2000	Contract amount
3203	contractNo	1234567876	Contract number
3205	status	^N	Contract status is explicitly set to NULL
$:132	Block identity	1234567876	Identity or reference value of the collection element

$:9=28|

Tag	Name	Value	Description
$:9	Checksum	28	Checksum of the CRM.DATA message

The trailer belongs to the single CRM.DATA message.

It is not a separate message.

Operator	Category	Meaning
=	Value assignment	Assigns a value to a field
^	State Modifier	Changes the logical state of a field
^N	State Modifier — Null	Explicitly sets the field to NULL
@	Reference	References another block or set of blocks
@2;3	Block reference	References blocks 2 and 3

Type	Name	Meaning
I	Instance	A single occurrence of an entity
V	Value	An element belonging to a collection or composite field