diff --git a/docs/diagrams/include/artist.iuml b/docs/diagrams/include/artist.iuml
index dceef0b..fe28fd4 100644
--- a/docs/diagrams/include/artist.iuml
+++ b/docs/diagrams/include/artist.iuml
@@ -1,3 +1,3 @@
-abstract Artist {
+class Artist {
     + name
 }
diff --git a/docs/diagrams/include/artwork.iuml b/docs/diagrams/include/artwork.iuml
index 525f1dc..a09475b 100644
--- a/docs/diagrams/include/artwork.iuml
+++ b/docs/diagrams/include/artwork.iuml
@@ -1,3 +1,3 @@
-abstract Artwork {
+class Artwork {
     + title
 }
diff --git a/docs/diagrams/include/artwork_details.iuml b/docs/diagrams/include/artwork_details.iuml
index d9bd039..0dd53b9 100644
--- a/docs/diagrams/include/artwork_details.iuml
+++ b/docs/diagrams/include/artwork_details.iuml
@@ -1,4 +1,4 @@
-abstract ArtworkDetails {
+class ArtworkDetails {
     + title
     + description
 }
diff --git a/docs/diagrams/include/collector.iuml b/docs/diagrams/include/collector.iuml
index 41e72d2..4c27a36 100644
--- a/docs/diagrams/include/collector.iuml
+++ b/docs/diagrams/include/collector.iuml
@@ -1,3 +1,3 @@
-abstract Collector {
+class Collector {
     + name
 }
diff --git a/docs/diagrams/include/corporate-actions_announcement.iuml b/docs/diagrams/include/corporate-actions_announcement.iuml
index 861a315..882bb5d 100644
--- a/docs/diagrams/include/corporate-actions_announcement.iuml
+++ b/docs/diagrams/include/corporate-actions_announcement.iuml
@@ -1,4 +1,4 @@
-abstract Announcement {
+class Announcement {
     + ratio
     + recordDate
     + payDate
diff --git a/docs/diagrams/include/corporate-actions_company.iuml b/docs/diagrams/include/corporate-actions_company.iuml
index e9f3644..b7c6db6 100644
--- a/docs/diagrams/include/corporate-actions_company.iuml
+++ b/docs/diagrams/include/corporate-actions_company.iuml
@@ -1,4 +1,4 @@
-abstract Company {
+class Company {
     + name
     + location
 }
diff --git a/docs/diagrams/include/corporate-actions_person.iuml b/docs/diagrams/include/corporate-actions_person.iuml
index 5d0ad3e..ead58c5 100644
--- a/docs/diagrams/include/corporate-actions_person.iuml
+++ b/docs/diagrams/include/corporate-actions_person.iuml
@@ -1,4 +1,4 @@
-abstract Person {
+class Person {
     + name
     + location
 }
diff --git a/docs/diagrams/include/corporate-actions_shareholding.iuml b/docs/diagrams/include/corporate-actions_shareholding.iuml
index 59979f4..438006e 100644
--- a/docs/diagrams/include/corporate-actions_shareholding.iuml
+++ b/docs/diagrams/include/corporate-actions_shareholding.iuml
@@ -1,4 +1,4 @@
-abstract Shareholding {
+class Shareholding {
     + quantity
     + nominalPrice
 }
diff --git a/docs/diagrams/include/corporate-actions_transfer_agent.iuml b/docs/diagrams/include/corporate-actions_transfer_agent.iuml
index 7c68ed7..4282e3e 100644
--- a/docs/diagrams/include/corporate-actions_transfer_agent.iuml
+++ b/docs/diagrams/include/corporate-actions_transfer_agent.iuml
@@ -1,4 +1,4 @@
-abstract TransferAgent {
+class TransferAgent {
     + name
     + location
 }
diff --git a/docs/diagrams/include/created.iuml b/docs/diagrams/include/created.iuml
index e55b7f2..6c24d87 100644
--- a/docs/diagrams/include/created.iuml
+++ b/docs/diagrams/include/created.iuml
@@ -1,3 +1,3 @@
-abstract Created {
+class Created {
     + title
 }
diff --git a/docs/diagrams/include/exhibited.iuml b/docs/diagrams/include/exhibited.iuml
index 4e466fb..8e08a2c 100644
--- a/docs/diagrams/include/exhibited.iuml
+++ b/docs/diagrams/include/exhibited.iuml
@@ -1,3 +1,3 @@
-abstract Exhibited {
+class Exhibited {
     + location
 }
diff --git a/docs/diagrams/include/manufacturing_certificate.iuml b/docs/diagrams/include/manufacturing_certificate.iuml
index 46051e7..0d36e89 100644
--- a/docs/diagrams/include/manufacturing_certificate.iuml
+++ b/docs/diagrams/include/manufacturing_certificate.iuml
@@ -1,3 +1,3 @@
-abstract Certificate {
+class Certificate {
     + CertID
 }
diff --git a/docs/diagrams/include/manufacturing_contractor.iuml b/docs/diagrams/include/manufacturing_contractor.iuml
index 6929a63..3eec5e9 100644
--- a/docs/diagrams/include/manufacturing_contractor.iuml
+++ b/docs/diagrams/include/manufacturing_contractor.iuml
@@ -1,4 +1,4 @@
-abstract Contractor {
+class Contractor {
     + CompanyName
     + Location
 }
diff --git a/docs/diagrams/include/manufacturing_item.iuml b/docs/diagrams/include/manufacturing_item.iuml
index c9d1174..fe9ef7e 100644
--- a/docs/diagrams/include/manufacturing_item.iuml
+++ b/docs/diagrams/include/manufacturing_item.iuml
@@ -1,3 +1,3 @@
-abstract Item {
+class Item {
     + PartID
 }
diff --git a/docs/diagrams/include/manufacturing_item_manufactured.iuml b/docs/diagrams/include/manufacturing_item_manufactured.iuml
index 1de0552..e898b1e 100644
--- a/docs/diagrams/include/manufacturing_item_manufactured.iuml
+++ b/docs/diagrams/include/manufacturing_item_manufactured.iuml
@@ -1,3 +1,3 @@
-abstract ItemManufactured {
+class ItemManufactured {
     + BatchID
 }
diff --git a/docs/diagrams/include/sold.iuml b/docs/diagrams/include/sold.iuml
index b377869..369098b 100644
--- a/docs/diagrams/include/sold.iuml
+++ b/docs/diagrams/include/sold.iuml
@@ -1,4 +1,4 @@
-abstract Sold {
+class Sold {
     + purchaseValue
     + purchaseValueCurrency
 }