!!! Overview
[{$pagename}] are [attributes] that allows a [Relationship] to be built between [ObjectClasses][{$pagename}]s The most examples is the [Microsoft Active Directory] [Group|Group-AD] to [User] [Member]-[MemberOf] [Relationship]

[Group|Group-AD]s have [members] which is the [Forward links], as they are the primary direction of the [Relationship]. The [User]-[MemberOf] is referred to as a [BackLink].

!! [{$pagename}] [EDirectory]
[EDirectory] [{$pagename}] which are of [DN Syntax] exhibit [Referential Integrity]

!! [Microsoft Active Directory] [AttributeSchema]
[Microsoft Active Directory] schema attribute classes declare what type of information this attribute stores (which will always be some derivative of a [DistinguishedName] ([DN])[Forward links] (or [Forward Reference]) attributes always have a [LinkID] __even value__ and for every [Forward link] the next [LinkID] value is, of course, an __odd value__ and is the [LinkID] to the corresponding [BackLink] attribute.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [Links and Backlinks in Active Directory for Exchange|https://www.neroblanco.co.uk/2015/07/links-and-backlinks-in-active-directory-for-exchange/|target='_blank'] - based on information obtained 2018-09-27- 
* [#2] - [Linked Attributes (AD DS)|https://docs.microsoft.com/en-us/windows/win32/ad/linked-attributes|target='_blank'] - based on information obtained 2020-01-02 
* [#2] - [Allow Linked Multi-Valued Attributes to use LVR|https://social.technet.microsoft.com/wiki/contents/articles/32132.active-directory-allow-linked-multi-valued-attributes-to-use-lvr.aspx?wa=wsignin1.0|target='_blank'] - based on information obtained 2020-02-25