Subdomain hosting properties are specified by complex type SubdomainPropertyType (subdomain.xsd). It is structured as follows:

Subdomain hosting properties are not specified in the protocol. To get a list of the available properties, use the site/get-physical-hosting-descriptor operation. For more information on this operation, refer to Retrieving Descriptor of Hosting Settings section.
The operation retrieves information on all properties of Plesk hosted objects in the form of Property Descriptor (refer to the section Representation of Object Descriptors: Property Descriptor). Use property extensions to filter out properties specific to subdomains or subdomains on subfolders. For more information about these extensions, refer to the section Representation of Object Descriptors: Property Descriptor > Extension of Hosting Settings Descriptor.
Note: You can use subdomain properties to set up custom PHP configuration for your subdomain. For this purpose, use the same syntax as for php.ini (the name node should contain the name of a PHP parameter and the value node - its value).
The following packet retrieved information on subdomain photo.example.com:
<packet version="1.5.2.0">
<subdomain>
<get>
<result>
<status>ok</status>
<filter-id>photo.example.com</filter-id>
<id>2</id>
<data>
<parent>example.com</parent>
<name>photo.example.com</name>
<property>
<name>ssi</name>
<value>false</value>
</property>
<property>
<name>php</name>
<value>false</value>
</property>
<property>
<name>cgi</name>
<value>true</value>
</property>
<property>
<name>perl</name>
<value>true</value>
</property>
<property>
<name>python</name>
<value>false</value>
</property>
<property>
<name>asp</name>
<value>true</value>
</property>
<property>
<name>coldfusion</name>
<value>false</value>
</property>
<property>
<name>fastcgi</name>
<value>false</value>
</property>
<property>
<name>miva</name>
<value>false</value>
</property>
<property>
<name>sys_user_type</name>
<value>main</value>
</property>
<property>
<name>login</name>
<value/>
</property>
<property>
<name>passwd</name>
<value/>
</property>
<property>
<name>quota</name>
<value/>
</property>
<property>
<name>passwd_type</name>
<value/>
</property>
<property>
<name>displayName</name>
<value>photo</value>
</property>
<property>
<name>ssl</name>
<value>false</value>
</property>
<property>
<name>same_ssl</name>
<value>false</value>
</property>
</data>
</result>
</get>
</subdomain>
</packet>