| Keyword | Aliases | Arg | Set | Description | 
| id |  | int | N | molecular id | 
| index |  | int | N | index on the molecule list | 
| numatoms |  | int | N | number of atoms | 
| name |  | str | N | the name of the molecule (usually the name of the file) | 
| filename |  | str | N | list of filenames for all files loaded for this molecule | 
| filetype |  | str | N | list of file types for this molecule | 
| database |  | str | N | list of databases for this molecule | 
| accession |  | str | N | list of database accession codes for this molecule | 
| remarks |  | str | N | list of freeform remarks for this molecule | 
| active |  | bool | Y | is/make the molecule active | 
| drawn | displayed | bool | Y | is/make the molecule drawn | 
| fixed |  | bool | Y | is/make the molecule fixed | 
| top |  | bool | Y | is/make the molecule top | 
| center |  | vector | Y | get/set the coordinate used as the center | 
| center_matrix |  | matrix | Y | get/set the centering matrix | 
| rotate_matrix |  | matrix | Y | get/set the rotation matrix | 
| scale_matrix |  | matrix | Y | get/set the scaling matrix | 
| global_matrix |  | matrix | Y | get/set the global (rotation/scaling) matrix | 
| view_matrix |  | matrix | N | get/set the overall viewing matrix | 
| numreps |  | int | N | the number of representations | 
| selection i |  | string | N | the string for the i'th selection | 
| rep i |  | string | N | the string for the i'th representation | 
| color i | colour | string | N | the string for the i'th coloring method | 
| numframes |  | int | N | number of animation frames | 
| frame |  | int | Y | current frame number | 
| timesteps |  | int | Y | number of elapsed timesteps in an interactive simulation | 
| angles |  | list | Y | topology angle types and definitions {type a1 a2 a3} | 
| dihedrals |  | list | Y | topology dihedral types and definitions {type a1 a2 a3 a4} | 
| impropers |  | list | Y | topology improper types and definitions {type a1 a2 a3 a4} | 
| bond |  | float | N | the bond energy (for the current frame) | 
| angle |  | float | N | the angle energy | 
| dihedral |  | float | N | the dihedral energy | 
| improper |  | float | N | the improper energy | 
| vdw |  | float | N | the van der Waal energy | 
| electrostatic | elec | float | N | the electrostatic energy | 
| hbond |  | float | N | the hydrogen bond energy | 
| kinetic |  | float | N | the total kinetic energy | 
| potential |  | float | N | the total potential energy | 
| energy |  | float | N | the total energy | 
| temperature | temp | float | N | the overall temperature | 
| pressure |  | float | Y | the simulation pressure | 
| volume |  | float | Y | the simulation volume | 
| efield |  | float | Y | efield | 
| alpha |  | float | Y | unit cell angle alpha in degrees (for the current frame) | 
| beta |  | float | Y | unit cell angle beta in degrees (for the current frame) | 
| gamma |  | float | Y | unit cell angle gamma in degrees (for the current frame) | 
| a |  | float | Y | unit cell length a in Angstroms (for the current frame) | 
| b |  | float | Y | unit cell length b in Angstroms (for the current frame) | 
| c |  | float | Y | unit cell length c in Angstroms (for the current frame) |