You can access Web Mapper to map source schema elements to target schema elements.
To access Data Mapper:
Go to ACCOUNTS and click Manage Objects.
Expand MAPPINGS and click Mapping > CREATE Mapping. The Create New Mapping screen is displayed in a new page.
- Type the name and description of the new mapping activity in the Name and Description text boxes.
- Select the Project from drop-down list of Select Project.
- Click Create to
Select the Source and Destination Layout checkbox which you want to use for Mapping and click Load.
| Info |
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| You can select multiple source and multiple layout for mapping. |
Understanding Data Mapper
The Data Mapper screen is displayed below:
The Data Mapper screen is divided into eight sections. These are outlined as:
- Menu Bar
- Tabs Panel
- Tool Bar
- Source Panel
- Target Panel
- Mapping Functions Panel
- Mapping Graph Area
- Parameters Panel
Menu Option
Sub-Option
Function
File
Load Schema
Loads the source and target schema activity into Data Mapper.
Save
Saves the mapping activity.
Exit
Exits the Data Mapper.
View
Enable Tool Tips For Source/Target Tree
Activates or deactivate tooltips to be displayed at the source or target leaf elements. Tool Tips are always displayed as active for root elements.
Move Connection Ends
Sets the width of connecting lines. By default, it is set to 50px.
View Mapping XML
Displays the generated XML file with line numbers. It is displayed in read-only mode.
Actions
Validate XSL
Validates the generated XSL file.
Global Custom XSL Before
Adds a custom XSL code at the top of the mapping XSL.
Global Custom XSL After
Adds a custom XSL code at the bottom of the mapping XSL.
On demand (optimized) loading of XML Schema tree
Process only the root level element; not the complete XSD, if the XSD is complex. When you expand the hierarchy elements, it processes child elements and loads them into memory. The hierarchy elements expansion is now displayed in the applet. This option is applicable only on XML schemas. It optimizes the processing of XML schemas and loads the XSD elements only up to 2 levels in the source and target panels. You need to click a hierarchy element to load its further child elements.
Cache Included Schemas
Set whether or not to cache the included XML schemas instead of inlining them as specified by the XML schema specification. This is applicable to all XML Schema which uses XSD.
Tree Expand Level for Optimized Loading
Defines the hierarchy level up to which the source and target files will be displayed for the schema loaded in Data Mapper. Hierarchy level is defined in the Tree Expand Level Dialog, which is opened when a user clicks this menu option. By default, its value is 3, that is, Data Mapper will display the hierarchy of source and target files for the respective schema up to level 3.
Easy Schema Parser Configuration
Defines the hierarchy level up to which the source and target files will process the schema to load it into the Data Mapper. You can define the hierarchy level in the Tree Expand Level Dialog box, it appears when you click on this menu option. The default value in the Tree Expand Level Dialog box is 10. This means that the Data Mapper will display the hierarchy of source and target files for the respective schema up to level 10.
Namespace
Manages Namespace.
Enable DBQuery caching
Enables DBQuery cache. This implies that if the same DBquery is fired on another element, it will generate the result from the existing query, instead of creating a new connection.
Search Element
Searches an element in the Source or Target schema hierarchy on the basis of Wild Card character(s) Comments, Data Type, Current Mapping Rules, Documentation, and Extension Node Element in the tree node of the Data Mapper.
Set Data Viewer Record Count
Sets the maximum number of records that can be shown in the data viewer.
Custom Auto Map Options
Adds a custom option for the Auto Mapper.
Value Map
Adds an option for value map.
Enable Quick Splitting
Splits data at the source and merges at the target end automatically.
Import Mapping
Maps the elements in a pattern similar to an existing mapping.
Set Character Set Encoding for Data Parsing
Sets the character set encoding for the target schema before mapping the data elements.
Create Context Schema Definition
Contains the name of the context variable that you want to map to another element.
XSL Settings
XSL Version: Gives you options to change the XSL version used in data mapping. The available options are - Version 1.1, Version 2.0, and Version 3.0.
XSL Transformer: Gives you a choice to select a parser to parse your mapping activity in the Data Mapper from the options - SAXON and XALAN. XALAN is supported only in XSL Version 1.1.Streaming Mode: Streaming is useful while working with large files or documents. Streaming processes files by streaming the part of a file rather than loading the whole file into memory. You need to enable streaming to process large size file while mapping Source and Destination elements but before enabling you must follow some streaming guidelines. This option is supported only with XSL Version 3.0.
Output Settings
Exclude Result Prefixes: Excludes a namespace prefix from the target element.
CData Section Elements: Defines the CDATA elements for the target schema which will be displayed on the Output section of the Debugger screen.
Filter Unmapped Elements: Filters the elements or attributes from appearing in the target XML.
Indent Output XML: Generates an indented mapping output (XML).
Filter Empty Elements: Filters the empty elements from appearing in the output mapping XML.
Help
Data Mapper Help
Displays online help for the Data Mapper section.
Mapping Functions Help
Displays online help for mapping functions.
Tip of the Day
Displays the tips on startup.
About Data Mapper
Displays the About box for the Data Mapper tool.
Data Mapper | Displays the Data Mapper screen for mapping source and target elements. |
XSL | Displays the generated XSL code with line numbers for the mapping activity. |
Debugger | Validates and views the output of the mapping activity. |
Name | Function |
|---|
| Load Schema | Open source and target schemas. | |
Save Mapping | Saves mapping activity. | |
Remove All Mappings | Removes all the mapping between the source and the target elements. | |
Validate XSL | Validates generated XSL. | |
Auto Mapper | Maps the source and the target elements if the structure of the source and the target schemas and the names of the source and the target elements are similar. | |
One to One Mapping | Maps all the source and the target elements under a parent element if the number of elements in the source and the target schemas are same. | |
Toggle Element Properties | Displays the property of the source or target element if it is defined in the schema. | |
Value Map | Opens the Value Map Options dialog box. | |
Custom Auto Map | Automatically map elements of source and target schemas where hierarchy and elements are different. | |
XSL Template(s) | Creates an XSL Template and further manage XSL templates from the Manage XSL Template screen. | |
Button | Name | Function |
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The Source Panel is used to display a source schema. All the elements of the source schema are listed in the Source Panel. When multiple source schemas are loaded, then all elements of each schema are listed under their respective source nodes.
Target Panel
The Target Panel is used to display a target schema. All the elements of the target schema are listed in the Target Panel. When multiple target schemas are loaded, then all elements of each schema are listed under their respective target nodes.
Mapping Functions Panel
The Mapping Functions Panel displays all mapping functions that can be used to map source and target schema elements. Mapping functions are supported by XSLT. However, the Data Mapper also includes some customized functions, which are not standard of XSLT. Refer to Using Mapping Functions for details on mapping elements using these functions.
Mapping Graph Area
The Mapping Graph Area is used to map the source and the target elements. You can apply the mapping function between source and target elements in this section. Mapping of the selected target element is displayed in the Mapping Graph Area. This mapping is displayed in the form of Mapping Rules (graphical representation) or as Textual Rules (code representation). Additionally, you can view and set target element properties such as adding comments for target elements and also repeat occurrences of a target element based on the occurrences of a source element, by applying the For Each property. Further, you can apply sorting rules for elements and also set the Disable-Output-Escaping property.
Additionally, you can create Local, Global, and Context Variables in Mapping Graph Area. You can also define Custom Methods and Key Functions in this section.
The Mapping Graph Area comprises of two tabs. These tabs further list sub tabs using which you can perform various functions. These are outlined in the table below.
Tabs of Mapping Graph Area
Tab | Sub-Tabs | Function |
|---|---|---|
Node
| Mapping Rules | Displays the graphical representation of the mapping of source and target elements. |
Textual Rule | Displays the textual code representation of the mapping of source and target elements. | |
Local Variables | Creates and defines local variables for mapping source and target elements. | |
Properties | Displays and set properties for source and target elements. Enables you to add comments for elements and applies sorting rules for target elements. It allows you to set the Disable-Output-Escaping property. | |
Global
| Global Variables | Creates and defines global variables for mapping source and target elements. |
Custom Methods | Creates global methods for mapping source and target elements. | |
Key Functions | Creates and defines keys for mapping source and target elements. | |
Context Variables | Creates and defines context variables for mapping source and target elements. | |
Connection Info | Creates and defines connection info variables for mapping source and target elements. | |
Data Viewer
| Source | Preview data of the uploaded file at the source end. |
Target | Preview data at the target end according to the uploaded source file and mapping rule applied. |
Buttons of Mapping Graph Area
Apply Mapping | Maps the selected source elements to the selected target elements. | |
Remove Mapping | Removes the mapping between the selected source and the target elements | |
Pop Out Parameters Panel | Pop out the Parameters Panel and display it as maximized. | |
Add Global/Local/Context Variable/Key | Adds a new global, local, context variable or a key. | |
Save Global/Local/Context Variable/Key | Saves a new local, global, context variable or a key. | |
Remove Selected Global/Local/Context Variable/Key | Removes the selected global variable, local variable, context variable or key. | |
Remove all Global/Local/Context Variables/Keys | Removes all existing global variables, local variables, context variables or keys. | |
Clears Global/Local variable name and value text fields | Clears all data entry fields while adding a local or global variable. | |
Add New Method | Adds a new custom method. | |
Remove Selected Method | Removes the selected custom method. | |
Button | Name | Function |
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You can expand the Mapping Graph Area by clicking Maximize () button displayed on the Split Bar below the Source and Target Panels. Similarly, by clicking Minimize (
) button, you can restore the Mapping Graph Area to its original size. Alternately, you can drag the Split Bar to resize the Mapping Graph Area and Source and Target Panels.
Parameters Panel
Global Variables | Displays a list of all the global variables defined for the mapping of source and target elements in the current mapping object. |
Local Variables | Displays a list of all the local variables defined for the mapping of source and target elements in the current mapping object. |
Custom Methods | Displays a list of all the methods defined for the mapping of source and target elements in the current mapping object. |
Keys | Displays a list of all the keys defined for the mapping of source and target elements in the current mapping object. |
Context Variables | Displays a list of all the context variables defined for the mapping of source and target elements in the current mapping object. All context variables created in the Data Mapper are transferred to the Process Flow Designer. |
Templates | Displays a list of all the XSL templates created for the mapping of source and target elements in the current mapping object. |
Connection Info | Displays a list of all connection info variables. |
Global Methods | Displays a list of all class files present in the Custom Classes folder. |
Value Map | Displays a list of value maps created for the elements |
Parameters | Description |
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All parameters are displayed in this section as and when they are created in the mapping process.
You can remove a parameter by right-clicking the parameter and selecting the Remove option.
You can expand the Mapping Graph Area by clicking Maximize () button displayed on the Split Bar below the Source and Target Panels. Similarly, by clicking Minimize (
) button, you can restore the Mapping Graph Area to its original size. Alternately, you can drag the Split Bar to resize the Mapping Graph Area and Source and Target Panels.
Click Modify Settings on the Create New Mapping screen to expand the advanced properties of the new Mapping activity.Anchor Modify Settings Modify Settings 
Select the Splitting Data checkbox to enable the splitting of data.
Info If you select this checkbox, then you have to split the data. You can do this by setting the Splitter XPath in the Data Mapper .
- Enter the number of records into which you want to split the data, in the Split Number of Records field. For example, if you have a source file of 100,000 records and you want split this file into records of 10,000 each, then you need to enter 10,000 in this field.
- Select the Parallel Processing checkbox to parallel process these records. By default, records are processed sequentially.
Enter the number of chunks you want to process concurrently, in the Maximum Concurrent Processes field. By default, value of 1 is entered.
Info It is advised to change this value, if Parallel Processing is selected. Else, only one chunk is processed at a time and hence sequentially. Click Create to open the Select Layout window.
Next Step
Load Source and Destination Layout