diff --git a/Gemfile.lock b/Gemfile.lock
index 707123d..7e7544c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,19 +1,19 @@
 PATH
   remote: .
   specs:
-    sapi-client-ruby (1.4.0)
+    sapi-client-ruby (1.4.1)
       faraday_middleware (~> 1.0.0)
       i18n (~> 1.5)
 
 GEM
   remote: https://rubygems.org/
   specs:
-    ansi (1.5.0)
+    ansi (1.6.0)
     ast (2.4.3)
     builder (3.3.0)
-    byebug (11.1.3)
+    byebug (13.0.0)
+      reline (>= 0.6.0)
     concurrent-ruby (1.3.7)
-    docile (1.4.1)
     faraday (1.10.6)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
@@ -39,12 +39,13 @@ GEM
     faraday-retry (1.0.4)
     faraday_middleware (1.0.0)
       faraday (~> 1.0)
-    i18n (1.14.8)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
-    json (2.20.0)
+    io-console (0.8.2)
+    json (2.21.1)
     language_server-protocol (3.17.0.6)
     lint_roller (1.1.0)
-    minitest (5.26.1)
+    minitest (5.27.0)
     minitest-reporters (1.8.0)
       ansi
       builder
@@ -53,7 +54,7 @@ GEM
     mocha (2.8.2)
       ruby2_keywords (>= 0.0.5)
     multipart-post (2.4.1)
-    parallel (1.28.0)
+    parallel (2.1.0)
     parser (3.3.11.1)
       ast (~> 2.4.1)
       racc
@@ -62,6 +63,8 @@ GEM
     rainbow (3.1.1)
     rake (13.4.2)
     regexp_parser (2.12.0)
+    reline (0.6.3)
+      io-console (~> 0.5)
     rubocop (1.88.2)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
@@ -78,20 +81,15 @@ GEM
       prism (~> 1.7)
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
-    simplecov (0.22.0)
-      docile (~> 1.1)
-      simplecov-html (~> 0.11)
-      simplecov_json_formatter (~> 0.1)
-    simplecov-html (0.13.2)
-    simplecov_json_formatter (0.1.4)
+    simplecov (1.0.1)
     unicode-display_width (3.2.0)
       unicode-emoji (~> 4.1)
     unicode-emoji (4.2.0)
     vcr (6.4.0)
 
 PLATFORMS
+  ruby
   x86_64-darwin-24
-  x86_64-linux
 
 DEPENDENCIES
   bundler
@@ -105,5 +103,50 @@ DEPENDENCIES
   simplecov
   vcr (~> 6.0)
 
+CHECKSUMS
+  ansi (1.6.0) sha256=ac9ea0c0ea8d32fb4e271348e609963ac78882f34b73836c2a02b3622e666658
+  ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
+  builder (3.3.0) sha256=497918d2f9dca528fdca4b88d84e4ef4387256d984b8154e9d5d3fe5a9c8835f
+  byebug (13.0.0) sha256=d2263efe751941ca520fa29744b71972d39cbc41839496706f5d9b22e92ae05d
+  concurrent-ruby (1.3.7) sha256=4412caec3a5ea2e5fdc52076724c071a81f2c0593d83b2ac8cbb8ca63b3151b0
+  faraday (1.10.6) sha256=7ff4802a6b312876a2241b3e641ce0d5045e168dd871b422c35b505e5261ad4d
+  faraday-em_http (1.0.0) sha256=7a3d4c7079789121054f57e08cd4ef7e40ad1549b63101f38c7093a9d6c59689
+  faraday-em_synchrony (1.0.1) sha256=bf3ce45dcf543088d319ab051f80985ea6d294930635b7a0b966563179f81750
+  faraday-excon (1.1.0) sha256=b055c842376734d7f74350fe8611542ae2000c5387348d9ba9708109d6e40940
+  faraday-httpclient (1.0.1) sha256=4c8ff1f0973ff835be8d043ef16aaf54f47f25b7578f6d916deee8399a04d33b
+  faraday-multipart (1.2.0) sha256=7d89a949693714176f612323ca13746a2ded204031a6ba528adee788694ef757
+  faraday-net_http (1.0.2) sha256=63992efea42c925a20818cf3c0830947948541fdcf345842755510d266e4c682
+  faraday-net_http_persistent (1.2.0) sha256=0b0cbc8f03dab943c3e1cc58d8b7beb142d9df068b39c718cd83e39260348335
+  faraday-patron (1.0.0) sha256=dc2cd7b340bb3cc8e36bcb9e6e7eff43d134b6d526d5f3429c7a7680ddd38fa7
+  faraday-rack (1.0.0) sha256=ef60ec969a2bb95b8dbf24400155aee64a00fc8ba6c6a4d3968562bcc92328c0
+  faraday-retry (1.0.4) sha256=dc659233777fabf96c69c2ffe56c0a5d2c102af90321a42cc6c90157bcd716aa
+  faraday_middleware (1.0.0) sha256=19e808539681bbf2e65df30dfbe27bb402bde916a1dceb4c7496dbe8de14334a
+  i18n (1.15.2) sha256=00f9eb62412fe593b2a65a97daa75300d37abb8f7202ec748e94b6d46a9dd1b5
+  io-console (0.8.2) sha256=d6e3ae7a7cc7574f4b8893b4fca2162e57a825b223a177b7afa236c5ef9814cc
+  json (2.21.1) sha256=13a43df75d95641443f5702dff350f237164a9d811ff0f2c2800d4d980220583
+  language_server-protocol (3.17.0.6) sha256=5ef2c0c138f8267e1bc631d3328347d354f96724b0af22f2c79516120443b7f0
+  lint_roller (1.1.0) sha256=2c0c845b632a7d172cb849cc90c1bce937a28c5c8ccccb50dfd46a485003cc87
+  minitest (5.27.0) sha256=2d3b17f8a36fe7801c1adcffdbc38233b938eb0b4966e97a6739055a45fa77d5
+  minitest-reporters (1.8.0) sha256=8ce5280fb73ad3178ae525454df169b6f28c1b38b1d088ea91815d3a370ba384
+  mocha (2.8.2) sha256=1f77e729db47e72b4ef776461ce20caeec2572ffdf23365b0a03608fee8f4eee
+  multipart-post (2.4.1) sha256=9872d03a8e552020ca096adadbf5e3cb1cd1cdd6acd3c161136b8a5737cdb4a8
+  parallel (2.1.0) sha256=b35258865c2e31134c5ecb708beaaf6772adf9d5efae28e93e99260877b09356
+  parser (3.3.11.1) sha256=d17ace7aabe3e72c3cc94043714be27cc6f852f104d81aa284c2281aecc65d54
+  prism (1.9.0) sha256=7b530c6a9f92c24300014919c9dcbc055bf4cdf51ec30aed099b06cd6674ef85
+  racc (1.8.1) sha256=4a7f6929691dbec8b5209a0b373bc2614882b55fc5d2e447a21aaa691303d62f
+  rainbow (3.1.1) sha256=039491aa3a89f42efa1d6dec2fc4e62ede96eb6acd95e52f1ad581182b79bc6a
+  rake (13.4.2) sha256=cb825b2bd5f1f8e91ca37bddb4b9aaf345551b4731da62949be002fa89283701
+  regexp_parser (2.12.0) sha256=35a916a1d63190ab5c9009457136ae5f3c0c7512d60291d0d1378ba18ce08ebb
+  reline (0.6.3) sha256=1198b04973565b36ec0f11542ab3f5cfeeec34823f4e54cebde90968092b1835
+  rubocop (1.88.2) sha256=8def251c90cd955feb4daa3edc0ab56893250c4ce90ef81e6c80c03f9a939bbf
+  rubocop-ast (1.50.0) sha256=b9ca88300da0803ee222ad20cdb30494c0a784eed06fdc35d254b06d662788db
+  ruby-progressbar (1.13.0) sha256=80fc9c47a9b640d6834e0dc7b3c94c9df37f08cb072b7761e4a71e22cff29b33
+  ruby2_keywords (0.0.5) sha256=ffd13740c573b7301cf7a2e61fc857b2a8e3d3aff32545d6f8300d8bae10e3ef
+  sapi-client-ruby (1.4.1)
+  simplecov (1.0.1) sha256=419d93c40484159d20b40e26e9a83cdd4c3afa2f3fd443bb8946c301cd658d75
+  unicode-display_width (3.2.0) sha256=0cdd96b5681a5949cdbc2c55e7b420facae74c4aaf9a9815eee1087cb1853c42
+  unicode-emoji (4.2.0) sha256=519e69150f75652e40bf736106cfbc8f0f73aa3fb6a65afe62fefa7f80b0f80f
+  vcr (6.4.0) sha256=077ac92cc16efc5904eb90492a18153b5e6ca5398046d8a249a7c96a9ea24ae6
+
 BUNDLED WITH
-   2.4.22
+  4.0.5
diff --git a/lib/sapi_client/application.rb b/lib/sapi_client/application.rb
index 38346a0..784851d 100644
--- a/lib/sapi_client/application.rb
+++ b/lib/sapi_client/application.rb
@@ -4,8 +4,8 @@ module SapiClient
   # Wraps an entire Sapi-NT application, such that we can walk over all of the
   # enclosed endpoint specifications to perform various operations, such as creating
   # methods we can call
-  class Application
-    def initialize(base_url, application_or_endpoints)
+  class Application # rubocop:disable Metrics/ClassLength
+    def initialize(base_url, application_or_endpoints) # rubocop:disable Metrics/MethodLength
       unless File.exist?(application_or_endpoints)
         raise(SapiError, "Could not find spec file/directory #{application_or_endpoints}")
       end
@@ -16,6 +16,10 @@ def initialize(base_url, application_or_endpoints)
       @specification = (@application_spec_file && YAML.load_file(application_or_endpoints)) || {
         'sapi-nt' => { 'config' => { 'loadSpecPath' => 'classpath:endpointSpecs' } }
       }
+
+      # Initialize parsed_model_spec and call parse_model_spec before returning
+      @parsed_model_spec = {}
+      parse_model_spec
     end
 
     attr_reader :base_url, :specification
@@ -36,14 +40,18 @@ def load_spec_path
       @endpoints_path || configuration['loadSpecPath'].sub(/^classpath:/, '')
     end
 
-    def endpoint_group_files
+    def final_path
       if @endpoints_path.nil?
-        Dir["#{application_spec_dir}/#{load_spec_path}/*.yaml"]
+        "#{application_spec_dir}/#{load_spec_path}/*.yaml"
       else
-        Dir["#{@endpoints_path}/*.yaml"]
+        "#{@endpoints_path}/*.yaml"
       end
     end
 
+    def endpoint_group_files
+      Dir[final_path]
+    end
+
     def endpoints
       endpoint_group_files
         .map { |spec| SapiClient::EndpointGroup.new(base_url, spec) }
@@ -56,7 +64,7 @@ def endpoints
     # and endpoint `e` will have a methdod `e()` to get the JSON items for
     # that endpoint, and a method `e_spec()` to get the endpoint specification
     def instance # rubocop:disable Metrics/MethodLength
-      inst = SapiClient::Instance.new(base_url)
+      inst = SapiClient::Instance.new(base_url, @parsed_model_spec)
 
       endpoints.each do |endpoint|
         inst.define_singleton_method(:"#{endpoint.name}", get_items_proc(endpoint, inst))
@@ -97,5 +105,105 @@ def get_hierarchy_proc(endpoint, inst)
         inst.get_hierarchy(endpoint_url, options, scheme)
       end
     end
+
+    # Parses the API model spec file and populates Hash with resulting class names and properties
+    def parse_model_spec # rubocop:disable Metrics/AbcSize,Metrics/CyclomaticComplexity,Metrics/MethodLength,Metrics/PerceivedComplexity
+      # Load model spec file
+      model_spec = final_path.gsub('/*.yaml', '/model.yaml')
+      m = YAML.load_file(model_spec)
+
+      # Parse class names and prefixes
+      qname2local = {}
+      m['classes'].each do |cls|
+        qname2local[cls['class']] = cls['name']
+      end
+      prefix2uri = m['prefixes']
+      builtins = {
+        'http://www.w3.org/1999/02/22-rdf-syntax-ns#langString' => 'String',
+        'http://www.w3.org/2001/XMLSchema#string' => 'String',
+        'http://www.w3.org/2000/01/rdf-schema#Literal' => 'String',
+        'http://www.w3.org/2001/XMLSchema#boolean' => 'bool',
+        'http://www.w3.org/2001/XMLSchema#date' => 'Date',
+        'http://www.w3.org/2001/XMLSchema#dateTime' => 'DateTime',
+        'http://www.w3.org/2001/XMLSchema#integer' => 'Integer',
+        'http://www.w3.org/2001/XMLSchema#decimal' => 'BigDecimal',
+        'http://www.w3.org/2001/XMLSchema#double' => 'Float'
+      }
+
+      # Parse classes and properties and populate @parsed_model_spec with the results
+      m['classes'].each do |cls|
+        # Skip if class has already been parsed
+        next if @parsed_model_spec.keys.include?(type2fulltype(cls['class'], prefix2uri))
+
+        # If not, parse class and properties
+        @parsed_model_spec[type2fulltype(cls['class'], prefix2uri)] = {}
+        cls['properties'].each do |prop|
+          ts = Set.new
+
+          if prop['type'].is_a?(Array)
+            prop['type'].each do |t|
+              ts << type2ruby(t, prefix2uri, qname2local, builtins)
+            end
+          else
+            ts << type2ruby(prop['type'], prefix2uri, qname2local, builtins)
+          end
+          ts << 'nil' if prop['optional']
+
+          @parsed_model_spec[type2fulltype(cls['class'], prefix2uri)][prop['name']] = returns(ts)
+          snake_prop = to_underscore(prop['name'])
+          if snake_prop != prop['name']
+            @parsed_model_spec[type2fulltype(cls['class'], prefix2uri)][snake_prop] =
+              returns(ts)
+          end
+        end
+      end
+
+      nil
+    rescue StandardError => e
+      puts(SapiError, "Error parsing model spec file #{model_spec}: #{e.message}")
+    end
+
+    # Helper method for parsing model spec file
+    def type2fulltype(typ, prefix2uri)
+      spl = typ.split(':')
+      pref = prefix2uri[spl[0]]
+      pref + spl[1]
+    rescue StandardError
+      typ
+    end
+
+    # Helper method for parsing model spec file
+    def type2ruby(typ, prefix2uri, qname2local, builtins)
+      full_uri = type2fulltype(typ, prefix2uri)
+      if qname2local.include? typ
+        qname2local[typ]
+      elsif builtins.include? full_uri
+        builtins[full_uri]
+      else
+        'String'
+      end
+    rescue StandardError
+      'String'
+    end
+
+    # Helper method for parsing model spec file
+    def returns(types)
+      if types.size > 1
+        "( #{types.join(' | ')} )"
+      elsif types.size == 1
+        types.first
+      else
+        'untyped'
+      end
+    end
+
+    # Helper method for parsing model spec file
+    def to_underscore(string)
+      string.gsub('::', '/')
+            .gsub(/([A-Z\d]+)([A-Z][a-z])/, '\1_\2')
+            .gsub(/([a-z\d])([A-Z])/, '\1_\2')
+            .tr('-', '_')
+            .downcase
+    end
   end
 end
diff --git a/lib/sapi_client/instance.rb b/lib/sapi_client/instance.rb
index 88f11c8..b980285 100644
--- a/lib/sapi_client/instance.rb
+++ b/lib/sapi_client/instance.rb
@@ -12,8 +12,9 @@ class Instance # rubocop:disable Metrics/ClassLength
     attr_accessor :request_logger
     attr_reader :base_url, :logger, :instrumenter
 
-    def initialize(base_url, config = {})
+    def initialize(base_url, parsed_model_spec = {}, config = {})
       @base_url = base_url
+      SapiClient::SapiResource.parsed_model_spec = parsed_model_spec
       @logger = config[:logger] || rails_logger
       @instrumenter = config[:instrumenter] || rails_active_support_notifications
     end
diff --git a/lib/sapi_client/sapi_resource.rb b/lib/sapi_client/sapi_resource.rb
index 8198f64..53aa229 100644
--- a/lib/sapi_client/sapi_resource.rb
+++ b/lib/sapi_client/sapi_resource.rb
@@ -9,6 +9,10 @@ module SapiClient
   # Commonly, this class will be the base class for creating domain-specific
   # model classes to encapsulate particular API values.
   class SapiResource # rubocop:disable Metrics/ClassLength
+    class << self
+      attr_accessor :parsed_model_spec
+    end
+
     # Create a new Sapi Resource, wrapping an existing value. The possible values
     # for `resource` are:
     # - a hash of values; hash keys will be transformed to symbols
@@ -92,7 +96,7 @@ def types
 
     # @return True if this resource has the given URI among its types
     def type?(uri)
-      type_uris = types&.map { |typ| typ.is_a?(String) ? typ : typ['@id'] }
+      type_uris = types&.map { |typ| type_to_string(typ) }
       type_uris&.include?(uri)
     end
 
@@ -134,15 +138,22 @@ def name(options = {})
     end
 
     def respond_to_missing?(property, _include_private = false)
-      resource.key?(property) || resource.key?(as_camel_case_method_name(property))
+      resource.key?(property) ||
+        resource.key?(as_camel_case_method_name(property)) ||
+        property_in_model_spec?(property) ||
+        property_in_model_spec?(as_camel_case_method_name(property))
     end
 
     def method_missing(property, *_args)
       return self[property] if resource.key?(property)
 
+      # If not found, try looking for a camelCase version of the property
       cc_property = as_camel_case_method_name(property)
       return self[cc_property] if resource.key?(cc_property)
 
+      # If still not found, check if it's in the model spec for this resource's type(s)
+      return nil if property_in_model_spec?(property) || property_in_model_spec?(cc_property)
+
       super
     end
 
@@ -193,9 +204,10 @@ def lang_select(values, preferred_lang)
     # Return the given value as an un-wrapped resource. A Hash given to this
     # method will have its keys transformed to symbols.
     def as_resource(res)
-      if res.is_a?(SapiResource)
+      case res
+      when SapiResource
         res.resource.clone
-      elsif res.is_a?(Hash)
+      when Hash
         hash_with_symbol_keys(res)
       else
         { '@id': res.to_s }
@@ -240,5 +252,20 @@ def as_camel_case_method_name(str)
       first_segment, *remaining_segments = str.to_s.split('_')
       [first_segment, *remaining_segments.map(&:capitalize)].join.to_sym
     end
+
+    # Helper method to convert type to string
+    def type_to_string(typ)
+      typ.is_a?(String) ? typ : typ['@id']
+    end
+
+    # Helper method to find if property is in parsed_model_spec for the corresponding type
+    def property_in_model_spec?(property)
+      return false unless (spec = self.class.parsed_model_spec)
+
+      types&.any? do |typ|
+        full_type = type_to_string(typ)
+        spec.key?(full_type) && spec[full_type].key?(property.to_s)
+      end
+    end
   end
 end
diff --git a/test/fixtures/cbd_api/endpointSpecs/model.yaml b/test/fixtures/cbd_api/endpointSpecs/model.yaml
new file mode 100644
index 0000000..1141e86
--- /dev/null
+++ b/test/fixtures/cbd_api/endpointSpecs/model.yaml
@@ -0,0 +1,216 @@
+type:    model
+name:    model
+prefixes:
+  core: http://data.food.gov.uk/cbd-products/def/core/
+  dct:  http://purl.org/dc/terms/
+  owl:  http://www.w3.org/2002/07/owl#
+  rdf:  http://www.w3.org/1999/02/22-rdf-syntax-ns#
+  rdfs: http://www.w3.org/2000/01/rdf-schema#
+  skos: http://www.w3.org/2004/02/skos/core#
+  xsd:  http://www.w3.org/2001/XMLSchema#
+  dcat: http://www.w3.org/ns/dcat#
+  foaf: http://xmlns.com/foaf/0.1/
+  vcard: http://www.w3.org/2006/vcard/ns#
+  def-cbd:        http://data.food.gov.uk/cbd-products/def/
+  pl-base:        http://data.food.gov.uk/cbd-products/id/
+  cbd-base:       http://data.food.gov.uk/cbd-products/id/
+  codespace:      http://data.food.gov.uk/cbd-products/id/codespace/
+  cdt:            http://w3id.org/lindt/custom_datatypes#
+  cbd-listing:    http://data.food.gov.uk/cbd-products/id/listing/
+  cbd-supplier:   http://data.food.gov.uk/cbd-products/id/supplier/
+  cbd-status:     http://data.food.gov.uk/cbd-products/id/application-status/
+
+properties:
+  - prop: "rdf:type"
+    name: "type"
+    kind: "object"
+    type: "rdfs:Resource"
+    optional: true
+    multi: true
+    unique: false
+  - prop: "core:searchText"
+    name: "searchText"
+    type: "xsd:string"
+    optional: true
+  - prop: "skos:notation"
+    name: "notation"
+    type: "xsd:string"  
+    optional: true
+  - prop: "core:memberOf"
+    name: "memberOf"
+    type: "code:Collection"
+    multi: false
+    optional: true
+  - prop: "core:dateTimeStamp"
+    name: "dateTimeStamp"
+    type: "xsd:date"
+    optional: true
+  - prop: "core:lastModified"
+    name: "lastModified"
+    type: "xsd:date"
+    optional: true
+  - prop: "core:remark"
+    name: "remark"
+    type: "xsd:string"
+    optional: true
+  - prop: "core:status"
+    name: "status"
+    type: "core:Concept"
+    optional: true
+
+classes:
+  - class: "core:Thing"
+    name: "Thing"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:memberOf"
+
+  - class: "core:Agent"
+    name: "Agent"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:memberOf"
+      - prop: "foaf:name"
+        name: "name"
+        kind: "datatype"
+        type: "rdf:langString"
+        optional: true
+        multi: true
+        unique: false
+        comment: "A name for some thing."
+
+  - class: "core:Concept"
+    name: "Concept"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:memberOf"
+      - prop: "skos:inScheme"
+        name: "inScheme"
+        type: "core:Concept"
+      - prop: "skos:prefLabel"
+        name: "prefLabel"
+        type: "xsd:string"
+        multi: false
+
+  - class: "core:ConceptScheme"
+    name: "ConceptScheme"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:memberOf"
+      - prop: "skos:hasTopConcept"
+        name: "hasTopConcept"
+        type: "core:Concept"
+  
+  - class: "core:List"
+    name: "List"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:memberOf"
+      - prop: "core:statusScheme"
+        name: "statusScheme"
+        type: "core:ConceptScheme"
+      - prop: "core:supplierGroup"
+        name: "supplierGroup"
+        type: "core:Collection"
+      - prop: "core:listEntryClass"
+        name: "listEntryClass"
+        type: "owl:Class"
+
+  - class: "core:Listing"
+    name: "Listing"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - prop: "core:memberOf"
+        name: "memberOf"
+        type: "core:List"
+      - "core:status"
+      - "core:remark"
+
+  - class: "core:ProductListing"
+    name: "ProductListing"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:dateTimeStamp"
+      - "core:lastModified"
+      - prop: "core:memberOf"
+        name: "memberOf"
+        type: "core:List"
+      - "core:remark"
+      - prop: "core:applicationNumber"
+        name: "applicationNumber"
+        optional: true
+        multi: true
+        type: "xsd:string"
+      - prop: "core:status"
+        name: "status"
+        type: "core:Concept"
+        optional: true
+        valueBase: "cbd-status:"
+      - prop: "core:manufacturerSupplier"
+        name: "manufacturerSupplier"
+        type: "core:Agent"
+        optional: true
+        valueBase: "cbd-supplier:"
+      - prop: "core:productId"
+        name: "productId"
+        optional: true
+        type: "xsd:string"
+      - prop: "core:productLinkedToApplication"
+        name: "productLinkedToApplication"
+        optional: true
+        type: "xsd:string"
+      - prop: "core:productName"
+        name: "productName"
+        type: "xsd:string"
+      - prop: "core:productSizeVolumeQuantity"
+        name: "productSizeVolumeQuantity"
+        optional: true
+        type: "xsd:string"
+  - class: "core:List"
+    name: "List"
+    properties:
+      - "rdf:type"
+      - "skos:notation"
+      - "core:searchText"
+      - "core:lastModified"
+      - prop: "skos:prefLabel"
+        name: "prefLabel"
+        type: "xsd:string"
+        multi: false
+      - prop: "core:memberOf"
+        name: "memberOf"
+        type: "core:List"
+      - "core:status"
+      - "core:remark"
+      - prop: "core:listEntryClass"
+        name: "listEntryClass"
+        type: "owl:Class"
+        optional: true
+      - prop: "core:statusScheme"
+        name: "statusScheme"
+        type: "skos:ConceptScheme"
+        optional: true
+      - prop: "core:supplierGroup"
+        name: "supplierGroup"
+        type: "core:Collection"
+        optional: true
diff --git a/test/sapi_client/application_test.rb b/test/sapi_client/application_test.rb
index 31e9f75..00e2a2a 100644
--- a/test/sapi_client/application_test.rb
+++ b/test/sapi_client/application_test.rb
@@ -97,6 +97,18 @@ def initialize(_json)
                 _(hierarchy.roots.size).must_equal(5)
               end
             end
+
+            describe '#parsed_model_spec' do
+              it 'should populate the parsed model spec on initialization' do
+                VCR.use_cassette('application.test_parsed_model_spec') do
+                  app = SapiClient::Application.new(
+                    'http://fsa-rp-test.epimorphics.net',
+                    'test/fixtures/regulated-products/application.yaml'
+                  )
+                  _(app.instance_variable_get(:@parsed_model_spec).size).must_be :>, 0
+                end
+              end
+            end
           end
         end
       end
diff --git a/test/sapi_client/sapi_resource_test.rb b/test/sapi_client/sapi_resource_test.rb
index 1c6bb93..de4eef7 100644
--- a/test/sapi_client/sapi_resource_test.rb
+++ b/test/sapi_client/sapi_resource_test.rb
@@ -344,6 +344,17 @@ class SapiResourceTest < Minitest::Test
           fixture = SapiClient::SapiResource.new(prefLabel: 'I am Womble!')
           _(fixture.pref_label).must_equal('I am Womble!')
         end
+
+        it 'should return nil for a property that is not present on the resource but is in the model spec' do
+          original_spec = SapiClient::SapiResource.parsed_model_spec
+          SapiClient::SapiResource.parsed_model_spec = { 'http://wimbledon.org/Womble' => { 'home' => 'String' } }
+          begin
+            fixture = SapiClient::SapiResource.new(name: 'Tobermory', type: { '@id' => 'http://wimbledon.org/Womble' })
+            _(fixture.home).must_be_nil
+          ensure
+            SapiClient::SapiResource.parsed_model_spec = original_spec
+          end
+        end
       end
 
       describe 'assignment' do