The Digital Property and the ARL

A digital property, defined by its name, type, and whether it is an exact match, identifies the set of objects you’re working on, and to understand what it is, you need first to understand the ARL. The ARL is similar to the URL, the difference being that the ARL is specifically defined for objects to be served via the edge network. There are two types of ARLs:

  • The v1 ARL

    This is the original ARL used in the content deliver network, and it contains data coded into its structure. Such an ARL might look like this:

    http://a123.g.akamai.net/7/123/456/e358f5de00e9/www.example.com/logo.gif

    The “example.com”—the portion that looks like a host name, is the ARL Token, a digital property type that is further discussed in the next subsection. It is a token because it refers to a hostname but is not necessarily in the form of a host name.

  • The v2 ARL

    On edge servers, configuration files provide extensive content control. The properties previously specified in the v1 ARL, along with many other properties, are defined in these files. The v2 ARL resembles a common URL:

    http://www.example.com/logo.gif

    The “www.example.com” is called a Host Header, the other digital property type. Simply, it is in the hostname that appears in the “Host:” header sent by the client browser; thus, Host Header.