How do I read a haplotype string?

Haplotype barcodes are strings which summarize the allele found at each of the defining sites for a constellation. They include one character per mutation/site (in order). My default:

• - represents a ref call
• X represents an ambiguous allele where one or more of the underlying nucleotides was an ambiguous base
• ? represents an insertion site (these are not typed)
• a number represents the number of deleted bases found at that site in amino acid space
• Any other character represents either the alt allele or another (non-ref, non-alt, non-ambig) allele found at the site.