liquibase command line: Cannot find the declaration of element 'changeSet'

Question

I'm trying to organize my changesets such that there is one changeset element per file, as implied by the Liquibase Best Practices, but I get the following error when i try to use the validate command on my liquidbase xml files.

liquibase: cvc-elt.1: Cannot find the declaration of element 'changeSet'. liquibase: Error thrown as a SAXException: Error parsing line 3 column 38 of ./1.xml: cvc-elt.1: Cannot find the declaration of element 'changeSet'.

What am I doing wrong?

master.xml:

<databaseChangeLog
    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd
    http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd">

    <include file="./1.xml"/>
    <include file="./2.xml"/>
</databaseChangeLog>

1.xml:

<?xml version="1.0" encoding="utf-8" ?>

<changeSet  id="1" author="me">
    <createTable
        tableName="CLIENTS"
        ...
    </createTable>
</changeSet >

Answer 1

Each included file needs to have the same XML root node as a standard changelog - so your 1.xml should look like this:

<?xml version="1.0" encoding="utf-8" ?>
<databaseChangeLog
    xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
    xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.1.xsd
    http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd">
  <changeSet  id="1" author="me">
      <createTable
          tableName="CLIENTS"
          ...
      </createTable>
  </changeSet >

You may also need to specify in the master changelog that the included files are relative to the master changelog.

...
  <include file="1.xml" relativeToChangelogFile="true"/>
...

Whether you need to do that is dependent on how you run liquibase.

Answer 2

Refer to the post here - http://forum.liquibase.org/topic/declaration-not-found-databasechangelog . Changing the xsd version from 3.0 to 2.0 in xml file worked for me.