HUMAnN is a pipeline for efficiently and accuretly profiling the presence/absence and abundance of microbial pathways in a community from metagenomic or metatranscriptomic sequencing data.
Read more about the tool: http://huttenhower.sph.harvard.edu/humann
By default, HUMAnN outputs do not attach names (glosses) to individual feature IDs to keep file sizes down. This tool is used to attach those names.
The most common use for this tool is attaching gene names to UniRef90/UniRef50 features in the default gene family output files. Features without names (common for many UniRef90/50 families) are assigned the default name: NO_NAME.