Hostname root domain (rootdomain)

[ 1 Description ] [ 2 How does it work in the search window? ] [ 3 How does it work in LINQ? ]

Description

Extracts the root domain from the hostnames in a given string field.

The root domain (example.com) is the overarching structure that contains the subdomains (blog.example.com), and every folder that belongs to a website. The root domain is the highest level subdomain within a domain listed in the Public Suffix List. The list contains domains with one or more levels.

How does it work in the search window?

Select Create field in the search window toolbar, then select the Hostname root domain operation. You need to specify one argument:

Argument	Data type

Argument	Data type
Hostname ^mandatory	string

The data type of the values in the new field is string.

Example

In the my.upload.sample.data table, we want to get the root domains of the hostnames in our Hostnames field. To do it, we will create a new field using the Hostname root domain operation.

The arguments needed to create the new field are:

Hostname - Hostnames field

Click Create field and you will see the following result:

How does it work in LINQ?

Use the operator select... as... and add the operation syntax to create the new column. This is the syntax for the Hostname root domain operation:

rootdomain(string)

Example

You can copy the following LINQ script and try the above example on the my.upload.sample.data table. Keep in mind that you must download the CSV file above to your Devo domain.

from my.upload.sample.data
select split(message, ";", 15) as Hostnames
select rootdomain(Hostnames) as root_domains