#:com.kardans.taxa{:tag :com.kardans.taxa/root,
                   :thing {:k :v}}

(in-taxa)  ;; Operate on hierarchy
(rel?)     ;; Boolean check for relationship
(when-rel) ;; Like if-let but testing with rel?
(rel->)    ;; Threading, but will short circut if not rel?

Taxa, an experiment in hierarchical domain logic

## Taxon
Just a spin on variants - think of it as a data wrapping that is the foundation
to utility fns. In short a taxon is a map of keys :com.kardans.taxa/tag and
:com.kardans.taxa/thing.

``` clojure
#:com.kardans.taxa{:tag :com.kardans.taxa/root,
                   :thing {:k :v}}
```

## What hierarchy

Taxa is a system of taxons put into a hierarchy based on taxons tag. Essentially
a taxon is a tag and a thing and the tag is put into the hierarchy. Taxa
provides a starting ground of tree tags (root, err & ok). You are encuraged to
build from these.

  ::root
   /  \
::err ::ok

## Utility fn
Beside the taxon and the hierarchy, Taxa also provides the following utility fns
for use:

``` clojure
(in-taxa)  ;; Operate on hierarchy
(rel?)     ;; Boolean check for relationship
(when-rel) ;; Like if-let but testing with rel?
(rel->)    ;; Threading, but will short circut if not rel?
```