Content Format for Metadata Files

Format the contents of your Audience Optimization metadata file according to these specifications.


The following syntax defines the structure of well-formed contents in a metadata file. Note, italics indicates a variable placeholder.

Syntax: content ID | name | parent ID

In the contents syntax, you'll notice a parent ID variable. Don't confuse it with the parent ID used in the metadata file name. These 2 variables seem similar, but they represent different things. In the file name, the parent ID corresponds to a category like "campaign" (ID 1), "placement" (ID 3), or "tactic" (ID 9), etc. In the file body:

  • The parent ID is the numeric ID of the object that the file contents belong to. For example, if your file contains creatives in a campaign, this value is the campaign ID.
  • If your file content does not have a parent ID, then use the NULL object (i.e., the non-printing programming object) or -1. You would use NULL or -1 when the parent ID in the file name is set to ID 0.

Separate File Entries With ASCII 001 or Tab

The non-printing ASCII 001 character is the preferred delimiter for separating contents in your file. If you cannot use ASCII 001, then separate file contents with a tab delimiter. As these are non-printing characters, the syntax example above shows a pipe "|" for display purposes only.


Let's take a look at how you would structure content in a metadata file. Part of this structure depends on the type of information categorized by the parent ID the file title.

With a Parent Object

Let's say you want to populate the creative drop down menu with creative names from a particular campaign. In this case, your metadata file name would include ID 1 (campaign) and ID 2 (creative). Following the content syntax, your metadata file would contain the creative ID, creative name, and actual campaign ID.

//file title

//creative IDs, names, and campaign IDs
111 Creative A 456
222 Creative B 456
333 Creative C 987

Without a Parent Object

Sometimes, the content in a metadata file does not have a parent object. In these cases, the:

  • File name parent ID is 0.
  • File content parent ID is the non-printing NULL object (preferred) or -1.
//file title

//file contents: creative IDs, names, and campaign IDs
888 Creative X NULL
777 Creative Y NULL
666 Creative Z NULL