digraph nitrogenw {

node[ height =.2,fontsize=8];

//nitrogen3



stock[shape=box];
container[shape=box];
value[shape=box];
flow[shape=box];

distributed_stock[shape=box];
distributed_flow[shape=box];
container[shape=box];

distributed_stock->stock[label="isa::",fontsize=10];
distributed_flow->flow[label="isa::",fontsize=10];

//stock attributes


agent[color=blue, style = filled];
ispartof[color=blue, style = filled];
quantity[color=blue, style = filled];

edge[arrowhead=none];
stock->agent[style=bold,color=blue, taillabel="*"]; 
stock->ispartof[style=bold,color=blue, taillabel="*"]; 
stock->quantity[style=bold,color=blue, taillabel="*"]; 

edge[arrowhead=normal];

agent->chemical_agent[color=blue];
ispartof->container[color=blue];
quantity->value[color=blue];

//flow attributes

source[color=blue, style = filled];
target[color=blue, style = filled];
agent1[color=blue, style = filled, label="agent"];
intensity[color=blue, style = filled];

edge[arrowhead=none];

flow->source[style=bold,color=blue, taillabel="*"]; 
flow->target[style=bold,color=blue, taillabel="*"]; 
flow->agent1[style=bold,color=blue, taillabel="*"]; 
flow->intensity[style=bold,color=blue, taillabel="*"]; 

edge[arrowhead=normal];
source->stock[color=blue,style=bold,];
target->stock[color=blue, style=bold,];
agent1->chemical_agent[color=blue, style=bold,];
intensity->value[color=blue, style=bold,];

//distributed stock attributes

related_agents[color=blue, style = filled];

distributed_stock->related_agents[arrowhead=none, style=bold,color=blue, taillabel="*"];
related_agents->chemical_agent[color=blue, dir=both, arrowsize=.6];

//distributed flow attributes

source1[color=blue, style = filled, label="source"];
target1[color=blue, style = filled, label="target"];
edge[arrowhead=none];

distributed_flow->source1[style=bold,color=blue, taillabel="*"]; 
distributed_flow->target1[style=bold,color=blue, taillabel="*"]; 

edge[arrowhead=normal];
source1->distributed_stock[color=blue,style=bold ];
target1->distributed_stock[color=blue, style=bold ];

//container attributes

stocks[color=blue, style = filled];
distributed_stocks[color=blue, style = filled];

edge[arrowhead=none];
container->stocks[style=bold,color=blue, taillabel="*"]; 
container->distributed_stocks[style=bold,color=blue, taillabel="*"]; 

edge[arrowhead=normal];
stocks->stock[color=blue,style=bold, dir=both, arrowsize=.6 ];
distributed_stocks->distributed_stock[color=blue,style=bold, dir=both, arrowsize=.6 ];









//new things start from here

biota[shape=box];
soil[shape=box];

organic_nitrogen[shape=box];
mineral_nitrogen[shape=box];

mineralization[shape=box];
plant_uptake[shape=box];

//isa arrows
biota->container[label="isa:",fontsize=9];
soil->container[label="isa:",fontsize=9];

organic_nitrogen->distributed_stock[label="isa:",fontsize=9];
mineral_nitrogen->distributed_stock[label="isa:",fontsize=9];

mineralization->distributed_stock[label="isa:",fontsize=9];
plant_uptake->distributed_stock[label="isa:",fontsize=9];

//mineral nitrogen attributes

ispartofmn[label="ispartof"];
agentmn[label="agent"];
related_agentsmn[label="related_agents"];

edge[arrowhead=none];
mineral_nitrogen->ispartofmn[taillabel="*"];
mineral_nitrogen->agentmn[taillabel="*"];
mineral_nitrogen->related_agentsmn[taillabel="*"];

edge[arrowhead=normal];

ispartofmn->soil;
agentmn->nitrogen;
related_agentsmn->ammonia[dir=both, arrowsize=.6 ]; 
related_agentsmn->ammonium[dir=both, arrowsize=.6 ];  
related_agentsmn->nitrate_ion[dir=both, arrowsize=.6 ];  
related_agentsmn->nitrite_ion[dir=both, arrowsize=.6 ]; 

//organic nitrogen attributes

ispartofon[label="ispartof"];
agenton[label="agent"];
related_agentson[label="related_agents"];

edge[arrowhead=none];
organic_nitrogen->ispartofon[taillabel="*"];
organic_nitrogen->agenton[taillabel="*"];
organic_nitrogen->related_agentson[taillabel="*"];

edge[arrowhead=normal];

ispartofon->biota;
agenton->nitrogen;
X[shape=box, label="X?", color=green];
related_agentson->X[dir=both, arrowsize=.6 ]; 
X->nitrogen_compound[label="isa:",fontsize=9];

//mineralization attributes
sourcemn[label="source"];
targetmn[label="target"];
edge[arrowhead=none];
mineralization->sourcemn[taillabel="*"];
mineralization->targetmn[taillabel="*"];

edge[arrowhead=normal];

sourcemn->organic_nitrogen; 
targetmn->mineral_nitrogen; 

//plant uptake attributes
sourcepu[label="source"];
targetpu[label="target"];
edge[arrowhead=none];
plant_uptake->sourcepu[taillabel="*"];
plant_uptake->targetpu[taillabel="*"];

edge[arrowhead=normal];

sourcepu->mineral_nitrogen; 
targetpu->organic_nitrogen;  

//nitrogen1
chemical_agent[shape=box];
nitrogen_compound[shape=box];
 
nitrogen[shape=box];
N[shape=box];
nitrogen_gas[shape=box];
N2[shape=box];
ammonia[shape=box];
NH3[shape=box];
ammonium[shape=box];
NH4[shape=box];
nitrous_oxide[shape=box];
N2O[shape=box];
nitric_oxide[shape=box]; 
NO[shape=box]; 
nitrogen_dioxide[shape=box]; 
NO2[shape=box];
nitrite_ion[shape=box]; 
NO2m[shape=box, label="NO2-"]; 
nitrate_ion[shape=box];
NO3m[shape=box, label="NO3-"]; 


nitrogenlabel[label="label"];
nitrogen_gaslabel[label="label"];
ammonialabel[label="label"];
ammoniumlabel[label="label"];
nitrous_oxidelabel[label="label"];
nitric_oxidelabel[label="label"];
nitrogen_dioxidelabel[label="label"];
nitrite_ionlabel[label="label"];
nitrate_ionlabel[label="label"];

edge[arrowhead=none];
nitrogen->nitrogenlabel;
nitrogen_gas->nitrogen_gaslabel;
ammonia->ammonialabel;
ammonium->ammoniumlabel;
nitrous_oxide->nitrous_oxidelabel;
nitric_oxide->nitric_oxidelabel;
nitrogen_dioxide->nitrogen_dioxidelabel;
nitrite_ion->nitrite_ionlabel;
nitrate_ion->nitrate_ionlabel;

edge[arrowhead=normal];

nitrogenlabel->N;
nitrogen_gaslabel->N2;
ammonialabel->NH3;
ammoniumlabel->NH4;
nitrous_oxidelabel->N2O;
nitric_oxidelabel->NO;
nitrogen_dioxidelabel->NO2;
nitrite_ionlabel->NO2m;
nitrate_ionlabel->NO3m;



nitrogen->nitrogen_compound[label="isa:",fontsize=9];
nitrogen_gas->nitrogen_compound[label="isa:",fontsize=9];
ammonia->nitrogen_compound[label="isa:",fontsize=9];
ammonium->nitrogen_compound[label="isa:",fontsize=9];
nitrous_oxide->nitrogen_compound[label="isa:",fontsize=9];
nitric_oxide->nitrogen_compound[label="isa:",fontsize=9];
nitrogen_dioxide->nitrogen_compound[label="isa:",fontsize=9];
nitrite_ion->nitrogen_compound[label="isa:",fontsize=9];
nitrate_ion->nitrogen_compound[label="isa:",fontsize=9];

nitrogen_compound->chemical_agent[label="isa::",fontsize=9];
//end nitrogen1

}