!!! Overview[1]
[{$pagename}] is a term used by [Microsoft Active Directory] however they appear to be what we and most others refer to them as [Virtual Attributes]


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We have also seen [Microsoft] use the term [Forward Reference] or [BackLink] used but as far as we know, both there terms are the same as [Virtual Attribute]
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Individual [{$pagename}], other than rootDSE Attributes, are specified in [[MS-ADA1], [[MS-ADA2], and [[MS-ADA3]. 

But briefly, [{$pagename}] have the property that they are attributes for which the [Attribute Value] is computed by using other attributes, sometimes from other objects. 

Regardless of this property, [{$pagename}] are defined to be those attributes that meet one of the following three criteria:
* The attributeSchema object's [SystemFlags] attribute has the [FLAG_ATTR_IS_CONSTRUCTED] [bit] (section 2.2.10) set to one.
* The attribute is a [rootDSE] attribute (see [section 3.1.1.3.2|http://msdn.microsoft.com/en-us/library/cc223254.aspx|target='_blank']).
* The attribute is a [BackLink] attribute.

Except as otherwise noted, these constructed attributes are applicable to both AD DS and AD LDS.


!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [3.1.1.4.5 Constructed Attributes|http://msdn.microsoft.com/en-us/library/cc223384.aspx|target='_blank'] - based on information obtained 2014-10-12