How to mass-deactivate 700 picklist values

Question

I am looking for a way to deactivate 700 picklist values (not manually)

I do NOT want to delete the values, only deactivate them

I am trying with ant migration tool with this package.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types>
        <members>Lead.LeadSource</members> 
        <name>CustomField</name>
    </types>
    <types> 
        <members>LeadSource</members> 
        <name>StandardValueSet</name> 
    </types> 
    <version>43.0</version>
</Package>

I get the metadata successfully but only the activated values, so I don't know how to get or set the values to be deactivated.

QUESTION

1. Is this possible via ant?

2. Any other way to do that?

UPDATE

This is the output I get after running the above package.xml:

<?xml version="1.0" encoding="UTF-8"?>
<StandardValueSet xmlns="http://soap.sforce.com/2006/04/metadata">
    <sorted>true</sorted>
    <standardValue>
        <fullName>Webinar_RealTime_September2011</fullName>
        <default>false</default>
        <label>Webinar_RealTime_September2011</label>
    </standardValue>
    <standardValue>
        <fullName>WebinarTailoringSearchResults</fullName>
        <default>false</default>
        <label>WebinarTailoringSearchResults</label>
    </standardValue>
    <standardValue>
        <fullName>Website</fullName>
        <default>false</default>
        <label>Website</label>
    </standardValue>
</StandardValueSet>

Answer 1

Set the isactive attribute to false and deploy those values back using ant.The values will be made inactive

Check documentation here

Example to set 2 values as inactive:

<?xml version="1.0" encoding="UTF-8"?>
<StandardValueSet xmlns="http://soap.sforce.com/2006/04/metadata">
    <sorted>true</sorted>
    <standardValue>
        <fullName>Webinar_RealTime_September2011</fullName>
        <default>false</default>
        <label>Webinar_RealTime_September2011</label>
        <isActive>false</isActive>
    </standardValue>
    <standardValue>
        <fullName>WebinarTailoringSearchResults</fullName>
        <default>false</default>
        <label>WebinarTailoringSearchResults</label>
        <isActive>false</isActive>
    </standardValue>
    <standardValue>
        <fullName>Website</fullName>
        <default>false</default>
        <label>Website</label>
    </standardValue>
</StandardValueSet>