• Subreports, crosstabs and charts are not allowed.
• Delayed evaluation for text fields and images is not allowed.
• Cells cannot split on multiple pages.

The type can be:

• One of the built-in types:

  None The current element doesn't represent a hyperlink. Reference The current hyperlink points to an external resource specified by the corresponding <hyperlinkReferenceExpression> element, usually an URL. LocalAnchor The current hyperlink points to a local anchor specified by the corresponding <hyperlinkAnchorExpression> element. LocalPage The current hyperlink points to a 1 based page index within the current document specified by the corresponding <hyperlinkPageExpression> element. RemoteAnchor The current hyperlink points to an anchor specified by the <hyperlinkAnchorExpression> element, within an external document indicated by the corresponding <hyperlinkReferenceExpression> element. RemotePage The current hyperlink points to a 1 based page index specified by the <hyperlinkPageExpression> element, within an external document indicated by the corresponding <hyperlinkReferenceExpression> element.

• A custom (arbitrary) type.

The result of this expression is used to sort the buckets, in ascending or descending order. If the bucket has an order by expression, the comparator will be used to compare values as produced by that expression. If no comparator expression is specified, the natural order will be used.

If this attribute is set to true, the crosstab will expand towards the right (or towards the left if the crosstab direction is RTL) as long as it needs to. This would result in crosstab cells being rendered over the page boundary; such elements will be exported by certain grid-based exporters such as the HTML or XLS ones, but will not be visible in export formats that observe the page width, such as the PDF exporter.

The default value of this flag is given by the net.sf.jasperreports.crosstab.ignore.width property.

• no rowTotalGroup and columnTotalGroup - the crosstab base cell (total for a city and a year)
• columnTotalGroup="Month" - total for a city and a year
• columnTotalGroup="Year" - total for a city and all years
• rowTotalGroup="City" - total for all cities of a country and a month
• rowTotalGroup="City" columnTotalGroup="Month" - total for all cities of a country and a year
• rowTotalGroup="City" columnTotalGroup="Year" - total for all cities of a country and all years
• rowTotalGroup="Country" - total for all countries and a month
• rowTotalGroup="Country" columnTotalGroup="Month" - total for all countries and a year
• rowTotalGroup="Country" columnTotalGroup="Year" - grand total

• the height of the header is given by the height attribute of <columnGroup>
• the width of the last column group header is given by the width of the base cell
• the width of a non-last column group header is the sum of the next group header's width and the next group total header's width (0 if the next group doesn't have a total header)

• the width of the header is given by the width attribute of <rowGroup>
• the height of the last row group header is given by the height of the base cell
• the height of a non-last row group header is the sum of the next group header's height and the next group total header's height (0 if the next group doesn't have a total header)

• the height is the sum the heights of this and subsequent column groups
• the width is the width of the base cell for this total column

• the width is the sum the widths of this and subsequent row groups
• the height is the height of the base cell for this total row

This expression is used to filter the rows of the data source that this dataset will iterate on.

This expression (if not null) is evaluated immediately after a new row is produced by the data source. The evaluation is performed using field and variable values corresponding to the new row. When the result of the evaluation is Boolean.TRUE the row gets processed by the report filling engine. When the result is null or Boolean.FALSE, the current row will be skipped and the datasource will be asked for the next row.