Specify a package workspace filter in a simple text format that will be applied to the package before build. This defines what content will be captured by the package.

Simple spec is defined simply as a line-by-line format where:
Content is "covered" by a filter root if the content path starts with, or is the same as the filter root path. Once the "covering" filter root is identified, its include/exclude rules are evaluated from top to bottom, by matching the content path against each rule pattern (which is a Java regular expression). The last rule whose pattern matches the content path defines whether that content is included (line starts with "+") or excluded (line starts with "-"). If no rules are defined, all content covered by that root path is included

For example, to include everything under /etc except for packages:
        /etc                 # define /etc as the filter root
        +/etc(/.*)?          # include everything under /etc
        -/etc/packages(/.)?  # exclude package paths
    

To create a package for a project "acme" defined in CRX DE Lite, a filter may look like this:
        /content/acme        # include the site content
        /apps/acme           # include the app code