A search predicate. Predicates are the basic unit of a Diamond search. A predicate specifies a set of options the user can adjust to configure the parameters of the search. It also specifies how to use these parameters to instantiate one or more Diamond filters to be included in the searchlet. A codec. Every searchlet includes one codec that assists in initial decoding of Diamond objects by performing such tasks as JPEG decoding and thumbnail generation. A codec typically does not have options, and its filters only drop invalid objects. A list of options to be displayed in the user interface. May include either option groups or individual options, but not both. A description of the filters to instantiate when performing a search. The predicate or codec name to be shown to the user. A list of options to be grouped into a labeled section within the user interface. The name for this option group to be shown to the user. The option name to be shown to the user. The name to be used when inserting this option into the option map. A boolean option, displayed in the user interface as a checkbox. Produces an argument with the value "true" or "false". The initial value of the option. A string option, displayed in the user interface as a single-line or multi-line text field. The initial value of the option. Whether to use a multi-line input field in the user interface. The width of the multi-line input field in characters. The height of the multi-line input field in characters. If specified, the option can be disabled by the user, and the initial enablement is as specified. The value returned if the option is disabled by the user. A numeric option, displayed in the user interface as an editable numeric field with increment/decrement buttons and a slider. Produces an argument formatted as an integer if possible, and as a double otherwise. The initial value of the option. If specified, the minimum value of the option. If specified, the maximum value of the option. The step size for the scroll buttons in the user interface. If specified, the option can be disabled by the user, and the initial enablement is as specified. The value returned if the option is disabled by the user. Infinite and NaN values are supported. A choice option, displayed in the user interface as a popup menu of choices. One possible value for the choice option. If specified, the option can be disabled by the user, and the initial enablement is as specified. The value returned if the option is disabled by the user. The choice name to be shown to the user. The argument to be provided to the filter if this choice is selected. True if this choice should be the initial value of the choice option. An option allowing the user to add example images to the search. The selected examples can then be included in a filter's blob argument by specifying <examples>. Produces an integer argument, probably not actually useful, which gives the number of examples provided. A single filter to instantiate. The minimum filter score in order to pass the object. The maximum filter score in order to pass the object. A list of filters that must run before this one. A list of arguments to be passed to this filter. Arguments are serialized to strings before they are sent to the server. Filters must convert them back to the desired type. The blob argument to be passed to this filter. If child elements are present, construct a blob argument consisting of a Zip archive containing the specified members. A fixed name for this filter. This should not be used unless there is a specific reason to hardcode the filter name. By default, filter names are dynamically generated to avoid conflicts if a filter is added more than once with different parameters. A label for specifying filter dependencies. The filename of the filter code. The name of the option specifying the threshold. A constant value for the threshold. Overridden by the "option" attribute. A filter that must run before this one. The label of the filter depended on. Filter dependencies should be specified by label rather than fixedName whenever possible. Labels can only refer to filters within the same predicate or codec. The fixed name of the filter depended on. Overridden by the "label" attribute. A single filter argument. The name of the option specifying the argument value. The label of the filter whose name should be used as the argument value. Labels can only refer to filters within the same predicate or codec. Overridden by the "option" attribute. A constant value for the argument. Overridden by the "option" and "label" attributes. Include an "examples" directory in the Zip archive which contains example images in PNG format. If present, the options section must include an exampleOption. Include the specified member in the Zip archive. The name of the option specifying the filename of the blob argument. Cannot be present if member elements are specified. The filename of the file containing the blob argument. Cannot be present if member elements are specified. The filename under which to store this member within the Zip archive. The name of the option specifying the file containing the data for this member. The name of the file containing the data for this member.