Filters: Custom Fields & Temp Store

Introduced in v2.77, Filters now contain two categories of fields that can be accessed during processing:

Stores the value of a specific log field: Custom Fields are configured in the Log Format and are available to Filters at the Raw and Page levels.

A "staging area" for variables, used to add / combine / manipulate data before being written to another field.

Custom Fields are used to add data to the reports when the data is stored in a log field that doesn't match a standard log field.

The primary use case for this feature is SharePoint Online Metadata & Page properties: a SPO metadata/property field can be added to the log and written to a Page-level Dimension (e.g. Page Category).

We recommend using an Advanced Filter with a Pattern Match of (.+) and an Output String of $1:1 - the following screenshot contains an example:

Data stored in the Temp Store fields is not added to the reports - for it to be saved, it must be written to another field (via a Filter).