Jaspersoft Studio supports two data-oriented export formats designed to be used programmatically when another application embeds TIBCO Jaspersoft products:

In both cases, the metadata defines the structure of the exported data.

Jaspersoft Studio also supports other types of field-level metadata:

This section describes how to work with metadata for PDF 508 Tags and for the JSON exporter.

Configuring a Report's Metadata for PDF 508 Tags

To add 508 functionality to a report, you must add tags to the report elements. Jaspersoft Studio has menu items that let you explicitly insert tags for headings, tables, and table-like elements. For more information about tags for 508 functionality in JasperReports Library, see the JasperReports Library Ultimate Guide.

Tagging Headings

You can tag text fields or static text elements as headings. You can include a range of static text elements and/or text fields in the same heading.

To tag a single element as a heading:

The setting is displayed in the upper left-hand corner of the element in design view. It is underlined to show the element is the full heading.

To tag multiple elements as a heading:

In design view, the start of a multi-element heading is shown in the upper left-hand corner of the Start element, and the end is shown in the lower right-hand corner of the End element.

To remove a heading tag from an element:

Using Automatic Table Tagging

To have Jaspersoft Studio automatically generate tags for the tables in your report, enable the net.sf.jasperreports.components.table.generate.pdf.tags property. This property can be set at the global, report, or table level.

To set this property globally:

To set this property for a report or table:

When the net.sf.jasperreports.components.table.generate.pdf.tags is set at the table level, the setting is displayed in the upper left-hand corner of the table in design view.

Manually Tagging Tables and Lists

Automatic table tagging only works with table elements. If you have a table-like element in your report, such as a list or a tabular arrangement of fields, it cannot be tagged automatically. However, you can manually insert list or table tags using the context menu. Like tables, manual tagging only works with text fields and static text. You manually tag lists and tables using a CSS-type structure. The general steps necessary to tag tables are shown.

To manually tag a tabular arrangement of elements as a table:

To manually tag elements as a list:

Setting Export Parameters

Once you have inserted your 508C tags correctly, you must set the PDF export parameters in your report.

4.

If necessary, click

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Click

Configuring a Report's Metadata for Use With the JSON Data Exporter

JasperReports Server's REST API includes a JSON (JavaScript Object Notation) data exporter that enables you to feed pure data into applications you integrate with the server. During report generation, this exporter skips all layout-related steps and returns a dataset. The structure of this data is determined by metadata you define in your report. You can also define expressions to determine how data from a specific filed is exported.

Note: The ability to define metadata and export data in JSON format is sometimes referred to as the JasperReports Data API.

You can define a structure by separating the names of the levels you want to create with periods (.). For example, consider a report with three fields configured with these JSON properties:

Field Expression                   JSON Path	[/code]

$F{salesamount}                    store.sale.amount[/code]

$F{salesyear}                      store.sale.year[/code]

$F{cust.name}                      store.cust.name[/code]                        

store  sale    amount    yearcust  name[/code]                            

Example exported data would be similar to:

Note that when you preview your report as JSON, the data is not formatted to be human readable, as above. You may want to use one of the many JSON formatting tools to review the output of your JSON tagged report, you can copy the JSON output from the Preview tab.

It's important to define paths that create a structure that the application receiving the data can interpret.

To define JSON export object metadata in your report:

If the field you selected appears in a frame, you're warned that JasperReports Library may ignore the property. This warning relates only to older versions of the library; it remains in the product for backwards-compatibility. For current versions of JasperReports Server, JasperReports Server, and Jaspersoft Studio, properties defined in frames aren't ignored.

This option is helpful if your source data doesn't include values for every row of data returned. Selecting this option instructs Jaspersoft Studio to simply use the last value passed when a value is missing, which may prevent problems in the application receiving the JSON object.

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If you want to manipulate the data being exported, check the Use custom expression for exported value check box, click

Selecting the JSON Metadata Preview