When you add a new Quickload site to IGB, IGB then requests a number of files (endpoints) from the site, some of which are optional. These include:

• contents.txt - tab-delimited file IGB uses this to determine which genome versions are supported on the site
• species.txt - optional
• chromosomes.txt - optional
• synonyms.txt - optional

Later, if a user selects one of the genomes supported by the site, IGB next requests:

genome_version/annots.xml

The file "annots.xml" must be located in a subdirectory of the quickload root directory, in a folder named for the genome version indicated in contents.txt which was requested before that.

IGB then reads the annots.xml file to identify which data sets are available for visualization. IGB uses the "annots.xml" data to populate the list of available datasets from that quickload site. The "annots.xml" file is similar to the "trackdb" file in a Track Hub in that it contains a list of datasets that can be loaded.

For this task, please review the above information and make sure it is correct by looking at the IGB logs as you add and use a quickload site.