Here are some usefull abbreviations.
A line notation for defining a substructure.
A line notation for defining a molecular structure.
Format for storing chemical and physical chemical related data. Mainly used for spectroscopical data.
XML standard with special definitions for molecular structures and molecular data like spectroscopic data. The advantage of CML is the expliclite data type definition and verbosity of this format. Additionally there exists a lot of XML parsers out there which faciliate to process these data type.