[389-users] SASL Mappings Question

I have a need to use a search filter in SASL mappings where it looks like something (&(uid=\1)(|(objectclass=x)(objectclass=y))) the & is being substituted like \1 as seen with tracing turned on. I have tried escaping it as \& and \\& <smb://&>. I can't find any documentation on how the substitution is handled with the filter. Is it not possible to utilize a normal ldap search filter like this in SASL mappings? thanks for answers and/or pointers. /mrg