JCAMP-DX is an ASCII based format and therefore not very compact even though it includes standards for file compression.

JCAMP-DX was initially developed for infrared spectrometry. This format was one of the earliest attempts to supply a standardized file format for data exchange in mass spectrometry. To address this limitation, several open, XML-based data formats have recently been developed by the Trans-Proteomic Pipeline at the Institute for Systems Biology to facilitate data manipulation and innovation in the public sector. Over the years, different manufacturers of mass spectrometers have developed various proprietary data formats for handling such data which makes it difficult for academic scientists to directly manipulate their data. The large volume of data produced in a typical mass spectrometry experiment requires that computers be used for data storage and processing. It is often coupled to chromatographic techniques such as gas- or liquid chromatography and has found widespread adoption in the fields of analytical chemistry and biochemistry where it can be used to identify and characterize small molecules and proteins ( proteomics). Mass spectrometry is a scientific technique for measuring the mass-to-charge ratio of ions.

How to open msms .cdf files