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Glossary
application programming interface (API)- a collection of specialized commands created to extend the capabilities
of an existing programming or scripting language
daemon- a background computing process which usually serves to "listen"
for a particular computing event; the event that is "heard"
by the daemon can then trigger other computing events
digest- a function used to assign a unique identifier
directed acyclic graph (DAG)- a collection of nodes (points or boxes) and edges (connector lines)
often used in computer science to describe a sequence of computing
events; a directed graph flows in a particular direction; a directed
acyclic graph does not "double back" on itself.
document type definition (DTD) - a "template" document used to define the elements allowed
in a particular type of an XML document
experiment- one particular instance, or execution, of a science model; consists
of one or more experiment steps
experiment step- a computational process with inputs and outputs within an experiment
lineage- the sequence of processing steps leading to the creation of some
data or information product; can also be thought of as the processing
history of a product
science object- experiments, experiment steps, inputs, and outputs
science workflow- the execution of a sequence of experiments
wrapper- A script that log metadata about science objects with minimal alteration
to existing processing methods
XML- eXtensible Markup Language; a standard, or meta-language, that allows
user-defined special instructions, or tags, within a text document;
this standard can be used to create text documents structured in a
custom format, which may be used for data transfer
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