diff --git a/schema/schema.go b/schema/schema.go
new file mode 100644
index 0000000..027ba06
--- /dev/null
+++ b/schema/schema.go
@@ -0,0 +1,112 @@
+package schema
+
+// OboJSON models the entire JSON schema of OBO Graph
+type OboJSON struct {
+	Graphs []*OboJSONGraph `json:"graphs"`
+}
+
+// OboJSONGraph models the graph section of OBO graph
+type OboJSONGraph struct {
+	ID                  string        `json:"id"`
+	Edges               []*JSONEdge   `json:"edges"`
+	Nodes               []*JSONNode   `json:"nodes"`
+	Meta                *JSONMeta     `json:"meta"`
+	EquivalentNodesSets []interface{} `json:"equivalentNodesSets"`
+	DomainRangeAxioms   []interface{} `json:"domainRangeAxioms"`
+	PropertyChainAxioms []struct {
+		ChainPredicateIds []string `json:"chainPredicateIds"`
+		PredicateID       string   `json:"predicateId"`
+	} `json:"propertyChainAxioms"`
+	LogicalDefinitionAxioms []struct {
+		DefinedClassID string   `json:"definedClassId"`
+		GenusIds       []string `json:"genusIds"`
+		Restrictions   []struct {
+			FillerID   string `json:"fillerId"`
+			PropertyID string `json:"propertyId"`
+		} `json:"restrictions"`
+	} `json:"logicalDefinitionAxioms"`
+}
+
+// JSONMeta models the meta section of OBO graph
+type JSONMeta struct {
+	BasicPropertyValues []*JSONProperty `json:"basicPropertyValues"`
+	Subsets             []string        `json:"subsets"`
+	Version             string          `json:"version"`
+	Synonyms            []*JSONSynonym  `json:"synonyms"`
+	Comments            []string        `json:"comments"`
+	Definition          struct {
+		Val   string   `json:"val"`
+		Xrefs []string `json:"xrefs"`
+	} `json:"definition"`
+	Xrefs []struct {
+		Val string `json:"val"`
+	} `json:"xrefs"`
+}
+
+// JSONEdge models the edges of OBO graph
+type JSONEdge struct {
+	Obj  string `json:"obj"`
+	Pred string `json:"pred"`
+	Sub  string `json:"sub"`
+}
+
+// JSONNode models the nodes of OBO graph
+type JSONNode struct {
+	ID       string    `json:"id"`
+	Lbl      string    `json:"lbl"`
+	Meta     *JSONMeta `json:"meta"`
+	JSONType string    `json:"type"`
+}
+
+// JSONSynonym models the synonyms of the nodes
+type JSONSynonym struct {
+	Pred  string   `json:"pred"`
+	Val   string   `json:"val"`
+	Xrefs []string `json:"xrefs"`
+}
+
+// JSONProperty models the properties of the nodes
+type JSONProperty struct {
+	Pred string `json:"pred"`
+	Val  string `json:"val"`
+}
+
+//type DbTerm struct {
+//Id         string           `json:"id"`
+//IRI        string           `json:"iri"`
+//Label      string           `json:"label"`
+//ChadoId    string           `json:"chado-id"`
+//Type       string           `json:"type"`
+//Definition string           `json:"definition"`
+//Synonyms   []*DbTermSynonym `json:"synonyms"`
+//Dbxrefs    []*DbTermDbxref  `json:"dbxrefs"`
+//Property   *DbTermProp      `json:"property"`
+//}
+
+//type DbTermDbxref struct {
+//Database  string `json:"database"`
+//Accession string `json:"accession"`
+//}
+
+//type DbTermSynonym struct {
+//Name  string `json:"name"`
+//Scope string `json:"scope"`
+//}
+
+//type DbTermProp struct {
+//Namespace  string    `json:"namespace"`
+//ReplacedBy string    `json:"replaced_by"`
+//Consider   []string  `json:"consider"`
+//Deprecated bool      `json:"deprecated"`
+//Comment    string    `json:"comment"`
+//Value      string    `json:"value"`
+//CreatedBy  string    `json:"created_by"`
+//CreatedOn  time.Time `json:"created_on"`
+//}
+
+//type DbRelationship struct {
+//From  string `json:"_from,omitempty"`
+//To    string `json:"_to,omitempty"`
+//Id    string `json:"id,omitempty"`
+//Label string `json:"label,omitempty"`
+//}