Tables are the basical metadata system in Dynamo. They are just matrices that describe the properties of sets of particles. The property coded on each column is fixed. dapropos table will give you a list of basic commands that you can use for table manipulation.
Format convention in a table
The convention can be consulted each time by the command dthelp
Reading and writing tables
Tables are customarily stored as text files with extension '.tbl'.
Tables can be read and write into the matlab worspace with the standard commands dwrite and dread.
For specially long tables, you can use the extension '.tbl', which will write the files in binary formays