Basic concept of HOBIT XML schemas. The basic concept of HOBIT XML schemas is explained step by step using SequenceML as an example. First an amino acid sequence with id and description in the well known FASTA format is converted to SequenceML. The color coding highlights the transformed content. In SequenceML it is possible to differentiate between various sequence types (in this case an amino acid sequence), defined by the SequenceML schema. The SequenceML schema derives its basic type information from BioTypes.