# OpenLink Virtuoso Universal Server: Documentation - field

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Virtuoso Functions Guide

## field

Name of input to be sent to and back between pup-up and parent window.
< field name (required) annotation (optional) initial-enable (optional) enabled (optional) instantiate (optional) control-udt (optional) xsd-stub-xhtml (optional) width (optional) height (optional) ref (optional) debug-srcfile (optional) debug-srcline (optional) debug-log (optional) />
Description

This element may occur under browse-button or select button, it enumerates the names of inputs to be sent between pop-up and parent window.

Attributes
name = SqlName

A page level unique name identifying a control.

annotation

A human readable comment.

initial-enable = CalculateableValue

Determines whether a control is initially visible. True by default. Could be data-bound to an SQL expression.

enabled = CalculateableValue

Determines whether a control is visible. True by default. Could be data-bound to an SQL expression.

instantiate = CalculateableValue

Determines whether a control instantiate its children. It is true by default. It could be data-bound to an SQL expression. Unlike most of calcucateable attributes, the value of this attribute for a control is calcluated before calling 'on-init' event handler of the control; other values are calculated before calling 'before-data-bind' event handler.

control-udt = SqlName

At run time every control is represented as an instance of some user-defined type (UDT). VSPX compiles selects the UDT to use depending on name of the XML element that represents the control and maybe some of its attributes. In some specific cases the application developer may instruct VSPX compiler to use some other UDT, e.g. an application-specific UDT that is derived from the preset one. If specified, the value of 'control-udt' attribute should be equal to the name of the desired target UDT.

xsd-stub-xhtml

This attribute is for internal use only. It has no effect if added to the source VSPX file.

width

Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited. The value of this attribute will not be used when the resulting HTML is rendered.

height

Visible width of the control when it is displayed in WYSIWYG tools when the source VSPX text is edited. The value of this attribute will not be used when the resulting HTML is rendered.

ref = SqlName

When a field is used as child of and return button then this must contain valid reference to name of a input control (like text, select-list, data-list etc.) from current page. The referenced control's value will be used to set the value of control with name specified in attribute 'name' in the target page. The data will be set using automatically generated JavaScript function.

debug-srcfile

URI of the source document where the tag comes from.

debug-srcline

Line number in the source document where the tag comes from.

debug-log

This defines what sort of data are saved to the debugging log.