Biocaml_unix.TrackTrack files in UCSC Genome Browser format. The following documentation assumes knowledge of concepts explained on the UCSC Genome Browser's website. Basically, a track file is one of several types of data (WIG, GFF, etc.), possibly preceded by comments, browser lines, and a track line. This module allows only a single data track within a file, although the UCSC specifies that multiple tracks may be provided together.
Track lines define display attributes. They can be thought of as lists of attribute-value pairs. For forward compatibility, this module allows arbitrary attributes to be set. However, the following lists known attributes and specifies restrictions on their values:
name - string enclosed in double quotes if there are spaces; recommended to use only alphanumeric characters and length less than 15 characters but this is not enforceddescription - string enclosed in double quotes if there are spaces; recommended to use only alphanumeric characters and length less than 60 characters but this is not enforcedvisibility - "hide", "dense", "full", "pack", or "squish"; if type=wiggle_0 then "hide", "dense", or "full"; can also use integer value where 0 = "hide", 1 = "dense", 2 = "full", 3 = "pack", 4 = "squish"color - "R,G,B" where each of R, G, and B are integers between 0 and 255altColor - "R,G,B" where each of R, G, and B are integers between 0 and 255itemRgb - "On" is the only allowed valueuseScore - 0 or 1group - stringpriority - integerautoScale - "on" or "off"gridDefault - "on" or "off"maxHeightPixels - "max:default:min" where each of max, default, and min are integersgraphType - "bar" or "points"viewLimits - "lower:upper" where each of lower and upper are integersyLineMark - floating point valueyLineOnOff - "on" or "off"windowingFunction - "maximum", "mean", or "minimum"smoothingWindow - "off" or an integer between 2 and 16db - should be a valid UCSC assembly ID, but currently any string is acceptedoffset - integerurl - stringhtmlUrl - stringtype - "wiggle_0" is the only value currently supported, leaving this attribute unset handles other track typestype t = [ | `track of (string * string) list| `comment of string| `browser of
[ `position of string * int * int | `hide of [ `all ] | `unknown of string ] ]The type of the parser "track" lines.
module Error : sig ... endmodule Transform : sig ... endLow-level transforms.