The Advance Positional schema activity defines the procedure to read data from and write data to a multiple record format file. You can do this by specifying the names and positions of the fields from which you want to fetch the data from.
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On the Adeptia Suite homepage, go to Configure > Services > Schema and then click the Adv. Positional. The Manage Adv. Positional Schema screen is displayed.
- Click the Create New link. This action will show the Create Advance Positional Schema screen.
Enter the name and description for Advance Positional Schema in the Name and Description text boxes respectively.Anchor Advanced_Positional_Layout Advanced_Positional_Layout - You need to create the schema definition for the Advance Positional Schema. You can define the schema in three ways. These are outlined as:
- Import Definition file
- Use Data Dictionary
- Enter the Fields Sequentially
Select the Import Definition File radio button, select the type of file from the dropdown list, and then click the Browse button to select the file that you want to use for defining the schema using the definition file .
To define the schema using a data dictionary, click the Use Data Dictionary radio button, select the name of the data dictionary from the dropdown list, and then click the Select Record button. This will display you the Select Record screen.
Info To know, how to create Data Dictionary, refer to the Creating Data Dictionary section.
This screen will display you the name of the data dictionary and a list of all the records that are in the dictionary. Select the checkbox against the record that you want to display in the Advance Positional schema.
Info To display all records, select the Select All checkbox.
Click OK. This closes the Select Record screen and displays the selected records under Record Definition on the Manage Advance Positional Schema screen. You can view or delete a record from this screen by clicking the appropriate button for that record.
To enter the fields manually, select the Enter the Fields Sequentially Using radio button and then click Record Definition. This action will further expand to display the Record Definition fields.
- Enter the name and description of the field in the FieldName and Description textboxes respectively.
- Select the type of data from the Type dropdown list.
- If data type is Date, select the format of date and time from the DateFormat and TimeFormat dropdown lists respectively.
- To define field position select one of the following options:
- Field Length
- Start & End Positions
- To define the field position using field length, select the Field Length radio button and then enter the length of the field in the Length field.
- To define the field position using start and end position, select the Start & End Position radio buttons.
- Enter the start position of the field in the Start textbox.
Enter the end position of the field in the End textbox.
Info The starting position of a row in a positional file is 1.
In a positional file, the schema counts a tab as one position and not eight positions.
By default, the schema creates these field positions in a sequence. You can also create a schema with fields that are not in sequence. For details, refer to the Defining Field Positions Non-Sequentially section.Select the alignment of the field from the Align dropdown list.
Info From Align select
L if the field is left aligned.
R if the field is right aligned.
To insert rows, specify the number and position of the rows that you want to add in the Number of Rows and at Position fields respectively and then click the Add Row button. You can add a maximum of 99 rows at a time.Select the Skip checkbox if you want to skip some fields while generating the XML for your schema. For example, your source file has over 1500 fields, but you only need to use 1000 fields. This Skip checkbox will omit the 500 unrequired fields and it will not read them when it parses the data to XML. However, the fields will be visible in the file. If you create the schema using an existing XSD, then the skipped fields will appear blank. However, when you will use the same schema in other activities such as Mapping, it will display all the fields of the file.
Info The skipping of fields is useful in case where a standard XSD has a large number of fields. Skipping reduces the size of the XML which will now contain the fields that we require.
While editing an existing schema, the field file that you will download, the Adeptia Suite will represent the skipped fields by 'T' and the unskipped fields by 'F' (see Figure 225). This depiction will remain the same while viewing the Print-Friendly Page.
Enter the name of any field in the Record Identifier textbox and the value of the field in the Value textbox.
Info Record Identifier is used to identify the records which will be parsed through this definition.
In Value you can also use regular expressions. To use regular expression enable Is Regex.- Click Add Record to define another set of data and repeat the steps from 6 to 20.
- After defining records you need to define their hierarchy. This is mandatory for creating an Advance Positional schema.
Once you finish adding the records, defining the Record Identifiers, and their values, click the Refresh button under Hierarchy Definition. This populates the Record Identifiers of the defined records, in the Record ID field under Hierarchy Definition.
- Select a record from the Record ID list box.
- Select Y or N from the Required list box to indicate if a record will appear in the source file.
- In the minoccur field, enter the minimum number of occurrences that you want a record to appear in the source file. If the Required field has the value as 'Y', then the minoccur field should at least have a minimum 1 occurrence in the source file. If the Required field has the value as 'N', then the minoccur field can be 0.
- In the maxoccur field enter the maximum number of occurrences that you want a record to appear in the source file. The maximum allowable value that you can enter in the maxoccur field is 2147483647.
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If you use Advance Positional schema as a target schema then, you can set the IsRemoveHeader attribute. This attribute will help you to skip the insertion/update of a record from the source file to the target database. You only need to set the IsRemoveHeader attribute to 'True'. This attribute is set in the Data Mapper, while mapping source and target schemas.
Steps to set IsRemoveHeader attribute
In the Data Mapper, load the source and target schemas. In the target schema, there is an IsRemoveHeader attribute.
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