Newbie question - how to concatenate in EQL?

Sorry for such a simple question but the answer is eluding me in the documentation and samples. How do you concatenate two attributes in EQL?
I have looked at https://wikis.oracle.com/display/endecainformationdiscovery/Endeca+Query+Language+%28EQL%29 but there is not much info there. Is there EQL documentation somewhere online?
Thank you

Currently, string concatenation is not supported in EQL. You should perform this concatenation in the ETL by creating a new attribute to house the concatenated value. (e.g. YEAR_MONTH_FIELD = YYYY-MM )

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Newbie question - how to concatenate in EQL?

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