MixDEM Help - Tag Reference

<Graph/>

<Graph> is the root tag for every MixDEM application, must contain all other tags.

Must be contained by :
Can contain : <Element>, <Metadata>, <Property>.
Required attributes :

Attribute	Description	Default
name	The project name.
created	date creation
modified	date modification
author	application author
license	application license
access	can be public or private. If access is set to private access, the user must sign to use this application through the Web API.	public
login	If access is private, this will be used as the HTTP Authentication user login
password	If access is private, this will be used as the HTTP Authentication user password
render	default response format.
node	default node to be execute.
offset	specifies how many records/rows should be skipped by default
rows	specifies how many records/rows should be read by default

<Property/>

<Property>, is a named constant holding information to be supplied later. You access the value of property by its name closed into ${}.

Must be contained by : <Graph>.
Can contain :
Required attributes : name, value

Attribute	Description	Default
name	property name (id)
value	property's value	NULL

<Element/>

<Element>, Contains elements that make up the graph. These elements are Nodes (perform various simple transformations) and/or Edges (connect Nodes and pass data around). Have no attribute.

Must be contained by : <Graph>.
Can contain : <Node>, <Edge>.
Required attributes :

Attribute	Description	Default
(none)

<Node/>

<Node> (Components), they can read, write or transform data from one form to another, every component has some input or output port(s) or both, component read or write data through them from to another component. Required attributes depends on the type of the used component.

Must be contained by : <Element>.
Can contain : <Attrib>
Required attributes : id, type

Attribute	Description	Default
id
type		DUMMY the default component, it will do nothing !

<Attrib/>

<Attrib> (Node attibute), can store an node attibute, this is used only by some components like "FILTER" et "REGEX".

Must be contained by : <Node>.
Can contain :
Required attributes : name

Attribute	Description	Default
name	attrib name (id)

<Edge/>

<Edge> represent data flows between two nodes. Edges role is to transmitting data in one direction from an <Node> output port to an other <Node> input port .

Must be contained by : <Element>.
Can contain :
Required attributes : id, from, to, metadata

Attribute	Description	Default
id
from	The id of source <Node>
to	The id of target <Node>
metadata	The name of <DataRecord> that describes the semantics of data record transmitted on the edge

<Metadata/>

<Metadata>, contains DataRecord metadata description used by <Edge>.

Must be contained by : <Graph>.
Can contain : <DataRecord>.
Required attributes :

Attribute	Description	Default
(none)

<DataRecord/>

<DataRecord> that represents metadata describing DataRecord or how to create data record from elementary data types ( string, date, integer, ..).

Must be contained by : <Metadata>.
Can contain : <DataField>.
Required attributes : name

Attribute	Description	Default
name	DataRecord name (id)

<DataField/>

<DataField> that represents metadata describing one particular data field.

Must be contained by : <DataRecord>.
Can contain :
Required attributes : name, type

Attribute	Description	Default
name	DataField name (id)
type	Indicates the type of filed from elementary data types ( string, date, integer, ..)	string
rename	If not empty, this will change the name of the field to rename value
format	Format of Number, Date, DateTime or empty if not applicable
size	Length of the field (in bytes) if the field belongs to fixLength record.
shift	Relative shift of the beginning of the field	0
trim	Indicates if when reading from file try to trim string value to obtain value	FALSE
nullable	Fields can or not be NULL.	TRUE
default	If nullable is FALSE, null will be replaced by default value .	NULL
compressed	Fields can be compressed	FALSE
compression	The compression used (bzip2, Zlib, ...) if compressed is TRUE	NULL