jta=true or xa-datasource in Jboss EAP 7 - jboss

Question

I'm trying to configure SQLSERVER datasource in standalone.xml. In my project i'm using JTA and i founded configuration with and others with . What is the difference ? I'm using this:
<datasource jta="true" jndi-name="java:jboss/datasources/mydatabase" pool-name="seguDS" enabled="true" use-java-context="true">
<connection-url>jdbc:jtds:sqlserver://192.168.40.16/mydatabase;instance=clust02</connection-url>
<driver>jtds-1.3.1.jar</driver>
<new-connection-sql>select 1</new-connection-sql>
<transaction-isolation>TRANSACTION_READ_COMMITTED</transaction-isolation>
<pool>
<min-pool-size>5</min-pool-size>
<max-pool-size>50</max-pool-size>
</pool>
<security>
<user-name>sa</user-name>
<password>sa</password>
</security>
<validation>
<check-valid-connection-sql>select 1</check-valid-connection-sql>
</validation>
<timeout>
<set-tx-query-timeout>true</set-tx-query-timeout>
<blocking-timeout-millis>5000</blocking-timeout-millis>
<idle-timeout-minutes>15</idle-timeout-minutes>
</timeout>
<statement>
<track-statements>false</track-statements>
</statement>
</datasource>
This works for me but i'm afraid if it correct or i should change to XA-DATASOURCE.

Answer 1

When you create a local-tx datasource in JBoss EAP 6.x or JBoss EAP 7, it defaults "jta" attribute to "true". This would help the local-tx resource to enlist in a global transaction. The "jta" attribute enables JTA integration for non-xa datasources only (https://access.redhat.com/documentation/en-US/JBoss_Enterprise_Application_Platform/6.1/html-single/Administration_and_Configuration_Guide/index.html#Datasource_Parameters1).
If your application uses global transactions, i.e. it needs a transaction manager to coordinate a distributed transaction across multiple resource managers, then you need XA Datasource.