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In computer science, a tagged union, also called a variant, variant record, choice type, discriminated union, disjoint union, sum type, or coproduct, is a data structure used to hold a value that could take on several different, but fixed, types.
Crosswalk tables are often employed within or in parallel to enterprise systems, especially when multiple systems are interfaced or when the system includes legacy system data. In the context of Interfaces, they function as an internal extract, transform, load (ETL) mechanism. For example, this is a metadata crosswalk from MARC standards to ...
The Variant Call Format or VCF is a standard text file format used in bioinformatics for storing gene sequence or DNA sequence variations. The format was developed in 2010 for the 1000 Genomes Project and has since been used by other large-scale genotyping and DNA sequencing projects.
For example, when annotating variants with characteristics such as (1) genomic function and (2) the functional role of the coding variant, the output file will contain all the columns from the input file, followed additional columns "genomic_function" (e.g. with values "exonic" or "intronic") and "coding_variant_function" (e.g. with values ...
For example, PKIX uses such notation in RFC 5912. With such notation (constraints on parameterized types using information object sets), generic ASN.1 tools/libraries can automatically encode/decode/resolve references within a document. ^ The primary format is binary, a json encoder is available. [10]
Variant is a data type in certain programming languages, particularly Visual Basic, OCaml, [1] Delphi and C++ when using the Component Object Model. It is an implementation of the eponymous concept in computer science .
A large number of variant annotation tools are available for variant annotation. The annotation by different tools does not always agree amongst each other, as the defined rules for data handling differ between applications. It is frankly impossible to perform a perfect comparison of the available tools.
An important part of the design of variant calling methods using NGS data is the DNA sequence used as a reference to which the NGS reads are aligned. In human genetics studies, high quality references are available, from sources such as the HapMap project , [ 10 ] which can substantially improve the accuracy of the variant calls made by variant ...