# Export

TIBCO FTL messages do not have destinations or subjects, or a mandatory set of predefined header fields. Instead, message fields and their values are set for individual messages.

If `export_properties` is defined as `true` in the common EMS transport properties, the EMS server converts the JMS properties and their values to TIBCO FTL fields and values and adds them to the outgoing message. This allows TIBCO FTL to use content matchers on the fields.

When converting the JMS properties to TIBCO FTL message fields, the property fields are given the prefix `_emsprop:`. For example the `JMS_TIBCO_SENDER` property would become the ``_emsprop:`JMS_TIBCO_SENDER field`.

The `tibemsd` server ignores any JMS property fields that are not set, or are set to null—it omits them from the exported message.

You can instruct `tibemsd` to exclude the properties fields from the exported message by setting the transport property `export_properties = false`.

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