The so-called "XML fields" are made up of a series of parameter tags. These were intended to work (very roughly) as an ontology type system. parameter have name, source, value. This is somewhat similar to EAV. Name elements appear lots of places, and describe the name of the thing they are attached to. Lots of of "things" have Other tags. These are XML fields that are a general dumping ground for stuff that doesn't fit anywhere into the schema. The source gives information about the BioSource- the original source of the material used to prepare the sample. The below element are all based on MIAME, and describe various aspects of the sample. The "extract" is the RNA sample, and is made from the source. This element contains the Source that made the Extract, the Extraction and Labelling protocols, and the ExtractDetails element This element gives information about the extract. This element gives information about how the extract was labelled. This element gives information about how the extract was labelled. A resultset is a collection of data Information about the normalisation protocol used Image Analysis Protocol details Images have one or more resultsets, plus a scanning protocol Scanning Protocol Slides- very important! Each slide represents one actual hybridisation of a sample to a microarray. Contains Extract-s hybridised to this array, and Image-s produced from this array. Also contains some trivia about the slide. Infomation about this slide Infomation about this slide Infomation about the type of microarray used Extracts associated with this slide The submitter is the person responsible for this experiment. A Hybridisation Set is a group of slides. Trivia about the Hybridisation Set Infomation about this experiment (abstract, etc.) Root tag that describes the experiment as a whole. Contains the Experiment details, the Hybridisation Sets, and the Submitter who sent the experiment. An ExperimentLite tag is like an Experiment only without the HybrSets (and by extension most of the experimental details). Used in the experiment browse page. An Experiment List is a list of ExperimentLite-s. Used on the oldexperimentbrowse.pl page. Root element for the pre-download page A list of XHTML form input tags that are hidden. Description of what you are downloading A list of slides. Root element for slide search dampsquib elements elements appear lots of places, and are basically an error message. The fact that it has a silly name reveals that I never really intended the public to see it. Root element for slide search. There used to be a sh element, hence the name. This element really isn't very usable for third-parties- which is probably a problem. There are lots of different possiblities for the contents of this element depending on what input is supplied A Root Element for the Super Search. Simply contains a list of Experiment Lite objects