CDI System

The **Corporeal Density Index System**, or just the **CDI System**, is classification system used by ghost hunters to set categories for the paranormal entities, created by the Ghostbusters.

## Class System

### Class I

These are undeveloped forms, insubstantial and difficult to see. Interaction with their environment is limited and enigmatic (i.e. spectral lights, voices and sounds, cold spots, ectoplasmic vapors, etc.). Higher forms may originally appear as Class I entities prior to full manifestation or draw the presence of Class I entities, serving as an indication of the presence of true supernatural phenomena. Simple application of a proton stream is normally effective for complete dispersal.

### Class II

Entities with awareness of time and space, Class II ghosts and up can physically manipulate things in this world. These forms are vague, inconsistent, or incomplete (i.e. floating sheets, ghostly hands, animated lips, etc.). Although a proton stream is normally effective, some Class II ghosts have the capacity to return attacks so caution is advised.

### Class III

Anonymous Hauntings. Distinct human form and personality is evident, but former identity (i.e. as a living being) is not established. Alternatively, may be human with a warped sense of identity or impartial corpus. If identity and form are established, the ghost is reassigned as a Class IV shade. Often difficult to deal with, Class III ghosts often possess sophisticated means of defense. Particularly malevolent Class III entities, such as poltergeists, can be especially dangerous. This class is also used for the ghosts of animals or of non-sentient, non-sapient spirits.

### Class IV

Identity of entity is intact. These entities have a distinct human form and personality with known identity. Economic disposal methods include research into the background of said entity, as well as possible communication with it. Research indicates a folk ritual of salting and burning the entities' mortal remains often proves as effective as proton streams and traps.

### Class V

These are ectoplasmic manifestations of definite but non-human form. Speculation includes the theory that Class V entities could be formed from emotionally-charged events or as side effects from ritual summoning. These typically require extensive proton stream implementation to sap their considerable ectoplasmic reserves to allow for capture, disposal, and eradication.

### Class VI

Parahuman interdimensional beings of significant power. Known by many names: faeries, djinns, spirits, daimons, shades, etc. Range of power varies. May be resistant to singular or even multiple proton streams, and may require prolonged exposure to three or more proton streams for sufficient weakening to allow trapping. Unique solutions are often required to handle these entities, including research into habitats, abilities, weaknesses, natural enemies, folklore origins, etc.

### Class VII

Exceptionally powerful entities exhibiting control over reality, time, space, or the classical elements. These are often identified by primitive cultures as "Gods", "Angels", "Demons", or other elevated forms of a Class VI entity. Entities which fit this classification often have harbingers or minions. Neutralizing such beings is usually a problematic undertaking at best. Most standard procedures are futile. The most realistic plan is to take measures to prevent these entities from entering the sphere of influence or even this reality in the first place. If nothing else is available, drastic measures can be used through crossing multiple photon streams to cause a total protonic reversal which may be sufficient to disperse the entity.

## Description System

* **Ghost**: Manifestations of the shade or soul of the deceased.
* **Corporeal**: Tangible manifestations.
* **Deity**: Supreme Beings.
* **Legend**: Entities popularized by mythologies, folklore, and legends.
* **Unstable**: A physical manifestation who forms itself with paranormally compromised items.
* **Environmental**: Ectoplasm, its Sub-Classes, and effects of.