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Within the Polyglot framework, a tool is alternatively known as converter to emphasize on the data format conversion capabilities. A converter resides within a software server which hosts the third party software/library with convert functionality. The software server is the component that automates the use of conversion capabilities of any piece of code through the converter. A converter can be is a wrapper script, written in any scripting languages such as bash, R, Python, on any existing piece of code to leverage its convert capability.
Similarly, a tool is known as extractor within Clowder framework to emphasize on the extraction of metadata from data content. An extractor is a program that extracts metadata within the file content, analyzes the file’s contents and tags it according to some specific classification or criteria, etc.