Collaborative Application Markup Language (CAML) has two major kinds of elements: those for field rendering and schema definition, and those for page (HTML) rendering. The page-rendering CAML elements are designed for use in rendering pages, such as when you need to extract the property of a specific field and render it on a page.
Elements can be used in two ways. Elements such as the Today element are used to generate a text string to be inserted within the page. Other elements are used to modify text generated by their child elements. Elements can also be concatenated to produce a concatenation of their output.
Main HTML-Rendering Elements
The following table describes some of the prominent CAML HTML-rendering elements.
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Name
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Description
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Batch
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Used for batch processing of commands within HTTP protocol.
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Case
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Used inside a Switch or FieldSwitch statement to perform a comparison.
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Default
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Contains the default value of a field to which new item forms are initialized.
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Expr
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Contains a CAML expression that is evaluated to determine the course of action for a Switch or FieldSwitch statement.
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FieldSwitch
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Provides conditional rendering based on the value of a CAML expression.
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ForEach
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Provides a basic mechanism for enumerating a collection of views or fields defined in the current list.
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GetVar
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Returns a variable in the context of rendering the page.
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HTMLBase
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Returns a string that sets the base element for the current page.
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HttpHost
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Renders the URL of the virtual server containing the current Web site.
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HttpPath
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Returns the path to the appropriate OWSSVR.DLL.
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HttpVDir
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Returns the root directory of the current site.
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IfEqual
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Allows for conditional rendering based on the comparison of two CAML expressions.
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ListProperty
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Returns the value of a specified column from the database.
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Now
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Renders the current time.
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Project
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The top-level element in Onet.xml.
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ProjectProperty
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Returns a global property of the current team Web site.
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Property
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Returns the property from the current ForEach context.
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SetList
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Designates the current list.
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SetVar
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Sets variables in the context of rendering the page.
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Switch
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Allows for conditional rendering based on the value of a CAML expression.
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Today
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Renders today's date.
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URL
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Renders a URL.
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View
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Defines a view in Windows SharePoint Services.
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XML
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Used as an outer wrapper to denote a section of CAML.
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Other Resources
Data-Defining Elements