In due course, we should install the relevant ISO 2- and 3-letter codes as the enumerated possible values . . .

may appear between child elements

The phrase (<ph>) element is used to organize content for reuse or conditional processing (for example, when part of a paragraph applies to a particular audience). »

The code phrase (<codeph>) element represents a snippet of code within the main flow of text. »

The syntax phrase (<synph>) element is a container for syntax definition elements. »

The user interface control (<uicontrol>) element represents a button, entry field, menu item, or other object that allows the user to control the interface. »

The <menucascade> element is used to document a series of menu choices, or to show any choice on a menu from which the user needs to choose. »

The superscript (<sup>) element indicates that text should be superscripted, or vertically raised in relationship to the surrounding text. »

A subscript (<sub>) indicates that text should be subscripted, or placed lower in relationship to the surrounding text. »

The teletype (<tt>) element is used to apply monospaced highlighting to the content of the element. »

The bold (<b>) element is used to apply bold highlighting to the content of the element. »

The underline (<u>) element is used to apply underline highlighting to the content of the element. »

The italic (<i>) element is used to apply italic highlighting to the content of the element. »

The message phrase (<msgph>) element contains the text content of a message produced by an application or program. »

The <filepath> element indicates the name and optionally the location of a referenced file by specifying the directory containing the file, and other directories that may precede it in the system hierarchy. »

The user input (<userinput>) element represens the text a user should input in response to a program or system prompt. »

The system output (<systemoutput>) element represents computer output or responses to a command or situation. »

The <term> element identifies words that represent extended definitions or explanations. »

Use the cross-reference (<xref>) element to link to a different location within the current topic, or a different topic within the same help system or DITA document. »

The <cite> element is used when you need a bibliographic citation that refers to a book or article. »

A quotation element (<q>) indicates content quoted from another source. »

The <state> element specifies a name/value pair whenever it is necessary to represent a named state that has a variable value. »

( Deprecated ) - The <boolean> element is used to express one of two opposite values, such as yes or no, on or off, true or false, high or low, and so forth. »

The <keyword> element identifies a keyword or token, such as a single value from an enumerated list, the name of a command or parameter, or a lookup key for a message (contrast with term).

The <option> element describes an option that can be used to modify a command (or something else, like a configuration). »

When referencing the name of an application programming interface parameter within the text flow of your topic, use the parameter name (<parmname>) element to markup the parameter. »

The <apiname> element provides the name of an application programming interface (API) such as a Java class name or method name. »

The window title <wintitle> element represents the title text that appears at the top of a window or dialog, and applies to wizard titles, wizard page titles, and pane titles. »

The message number (<msgnum>) element contains the number of a message produced by an application or program. »

The variable name (<varname>) element defines a variable that must be supplied to a software application. »

The command name (<cmdname>) element specifies the name of a command when it is part of a software discussion. »

The trademark (<tm>) element in DITA is used to markup and identify a term or phrase that is trademarked. »

The <data> element represents a property within a DITA topic or map. »

The <data-about> element identifies the subject of a property when the subject isn't associated with the context in which the property is specified. »

The <foreign> element is an open extension that allows information architects to incorporate existing standard vocabularies for non-textual content. like MathML and SVG, as inline objects. »

The <unknown> element is an open extension that allows information architects to incorporate xml fragments that does not necessarily fit into an exisitng DITA use case. »