diff --git a/app/assets/javascripts/error_templates.js b/app/assets/javascripts/error_templates.js
new file mode 100644
index 00000000..1b9b5234
--- /dev/null
+++ b/app/assets/javascripts/error_templates.js
@@ -0,0 +1,18 @@
+$(function() {
+    if ($.isController('error_templates')) {
+        $('#add-attribute').find('button').on('click', function () {
+            $.ajax(location + '/attribute.json', {
+                method: 'POST',
+                data: {
+                    _method: 'PUT',
+                    dataType: 'json',
+                    error_template_attribute_id: $('#add-attribute').find('select').val()
+                }
+            }).success(function () {
+                location.reload();
+            }).error(function (error) {
+                $.flash.danger({text: error.statusText});
+            });
+        });
+    }
+});
\ No newline at end of file
diff --git a/app/assets/stylesheets/error_templates.scss b/app/assets/stylesheets/error_templates.scss
new file mode 100644
index 00000000..29b2f96c
--- /dev/null
+++ b/app/assets/stylesheets/error_templates.scss
@@ -0,0 +1,9 @@
+#add-attribute {
+  display: flex;
+  max-width: 400px;
+  margin-top: 30px;
+
+  button {
+    margin-left: 10px;
+  }
+}
\ No newline at end of file
diff --git a/app/controllers/concerns/submission_scoring.rb b/app/controllers/concerns/submission_scoring.rb
index 8891332a..35de4ba5 100644
--- a/app/controllers/concerns/submission_scoring.rb
+++ b/app/controllers/concerns/submission_scoring.rb
@@ -9,6 +9,14 @@ module SubmissionScoring
         assessment = assessor.assess(output)
         passed = ((assessment[:passed] == assessment[:count]) and (assessment[:score] > 0))
         testrun_output = passed ? nil : 'message: ' + output[:message].to_s + "\n stdout: " + output[:stdout].to_s + "\n stderr: " + output[:stderr].to_s
+        if !testrun_output.blank?
+          submission.exercise.execution_environment.error_templates.each do |template|
+            pattern = Regexp.new(template.signature).freeze
+            if pattern.match(testrun_output)
+              StructuredError.create_from_template(template, testrun_output)
+            end
+          end
+        end
         Testrun.new(submission: submission, cause: 'assess', file: file, passed: passed, output: testrun_output).save
         output.merge!(assessment)
         output.merge!(filename: file.name_with_extension, message: feedback_message(file, output[:score]), weight: file.weight)
diff --git a/app/controllers/error_template_attributes_controller.rb b/app/controllers/error_template_attributes_controller.rb
new file mode 100644
index 00000000..05de2772
--- /dev/null
+++ b/app/controllers/error_template_attributes_controller.rb
@@ -0,0 +1,86 @@
+class ErrorTemplateAttributesController < ApplicationController
+  before_action :set_error_template_attribute, only: [:show, :edit, :update, :destroy]
+
+  def authorize!
+    authorize(@error_template_attributes || @error_template_attribute)
+  end
+  private :authorize!
+
+  # GET /error_template_attributes
+  # GET /error_template_attributes.json
+  def index
+    @error_template_attributes = ErrorTemplateAttribute.all.order('important DESC', :key, :id).paginate(page: params[:page])
+    authorize!
+  end
+
+  # GET /error_template_attributes/1
+  # GET /error_template_attributes/1.json
+  def show
+    authorize!
+  end
+
+  # GET /error_template_attributes/new
+  def new
+    @error_template_attribute = ErrorTemplateAttribute.new
+    authorize!
+  end
+
+  # GET /error_template_attributes/1/edit
+  def edit
+    authorize!
+  end
+
+  # POST /error_template_attributes
+  # POST /error_template_attributes.json
+  def create
+    @error_template_attribute = ErrorTemplateAttribute.new(error_template_attribute_params)
+    authorize!
+
+    respond_to do |format|
+      if @error_template_attribute.save
+        format.html { redirect_to @error_template_attribute, notice: 'Error template attribute was successfully created.' }
+        format.json { render :show, status: :created, location: @error_template_attribute }
+      else
+        format.html { render :new }
+        format.json { render json: @error_template_attribute.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /error_template_attributes/1
+  # PATCH/PUT /error_template_attributes/1.json
+  def update
+    authorize!
+    respond_to do |format|
+      if @error_template_attribute.update(error_template_attribute_params)
+        format.html { redirect_to @error_template_attribute, notice: 'Error template attribute was successfully updated.' }
+        format.json { render :show, status: :ok, location: @error_template_attribute }
+      else
+        format.html { render :edit }
+        format.json { render json: @error_template_attribute.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /error_template_attributes/1
+  # DELETE /error_template_attributes/1.json
+  def destroy
+    authorize!
+    @error_template_attribute.destroy
+    respond_to do |format|
+      format.html { redirect_to error_template_attributes_url, notice: 'Error template attribute was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_error_template_attribute
+      @error_template_attribute = ErrorTemplateAttribute.find(params[:id])
+    end
+
+    # Never trust parameters from the scary internet, only allow the white list through.
+    def error_template_attribute_params
+      params[:error_template_attribute].permit(:key, :description, :regex, :important)
+    end
+end
diff --git a/app/controllers/error_templates_controller.rb b/app/controllers/error_templates_controller.rb
new file mode 100644
index 00000000..2632abf9
--- /dev/null
+++ b/app/controllers/error_templates_controller.rb
@@ -0,0 +1,104 @@
+class ErrorTemplatesController < ApplicationController
+  before_action :set_error_template, only: [:show, :edit, :update, :destroy, :add_attribute, :remove_attribute]
+
+  def authorize!
+    authorize(@error_templates || @error_template)
+  end
+  private :authorize!
+
+  # GET /error_templates
+  # GET /error_templates.json
+  def index
+    @error_templates = ErrorTemplate.all.order(:execution_environment_id, :name).paginate(page: params[:page])
+    authorize!
+  end
+
+  # GET /error_templates/1
+  # GET /error_templates/1.json
+  def show
+    authorize!
+  end
+
+  # GET /error_templates/new
+  def new
+    @error_template = ErrorTemplate.new
+    authorize!
+  end
+
+  # GET /error_templates/1/edit
+  def edit
+    authorize!
+  end
+
+  # POST /error_templates
+  # POST /error_templates.json
+  def create
+    @error_template = ErrorTemplate.new(error_template_params)
+    authorize!
+
+    respond_to do |format|
+      if @error_template.save
+        format.html { redirect_to @error_template, notice: 'Error template was successfully created.' }
+        format.json { render :show, status: :created, location: @error_template }
+      else
+        format.html { render :new }
+        format.json { render json: @error_template.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # PATCH/PUT /error_templates/1
+  # PATCH/PUT /error_templates/1.json
+  def update
+    authorize!
+    respond_to do |format|
+      if @error_template.update(error_template_params)
+        format.html { redirect_to @error_template, notice: 'Error template was successfully updated.' }
+        format.json { render :show, status: :ok, location: @error_template }
+      else
+        format.html { render :edit }
+        format.json { render json: @error_template.errors, status: :unprocessable_entity }
+      end
+    end
+  end
+
+  # DELETE /error_templates/1
+  # DELETE /error_templates/1.json
+  def destroy
+    authorize!
+    @error_template.destroy
+    respond_to do |format|
+      format.html { redirect_to error_templates_url, notice: 'Error template was successfully destroyed.' }
+      format.json { head :no_content }
+    end
+  end
+
+  def add_attribute
+    authorize!
+    @error_template.error_template_attributes << ErrorTemplateAttribute.find(params['error_template_attribute_id'])
+    respond_to do |format|
+      format.html { redirect_to @error_template }
+      format.json { head :no_content }
+    end
+  end
+
+  def remove_attribute
+    authorize!
+    @error_template.error_template_attributes.delete(ErrorTemplateAttribute.find(params['error_template_attribute_id']))
+    respond_to do |format|
+      format.html { redirect_to @error_template }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_error_template
+      @error_template = ErrorTemplate.find(params[:id])
+    end
+
+    # Never trust parameters from the scary internet, only allow the white list through.
+    def error_template_params
+      params[:error_template].permit(:name, :execution_environment_id, :signature, :description, :hint)
+    end
+end
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
index 4dfa182c..8e7a8e39 100644
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -6,7 +6,7 @@ class SubmissionsController < ApplicationController
   include SubmissionScoring
   include Tubesock::Hijack
 
-  before_action :set_submission, only: [:download, :download_file, :render_file, :run, :score, :show, :statistics, :stop, :test]
+  before_action :set_submission, only: [:download, :download_file, :render_file, :run, :score, :extract_errors, :show, :statistics, :stop, :test]
   before_action :set_docker_client, only: [:run, :test]
   before_action :set_files, only: [:download, :download_file, :render_file, :show]
   before_action :set_file, only: [:download_file, :render_file]
@@ -191,6 +191,9 @@ class SubmissionsController < ApplicationController
   end
 
   def kill_socket(tubesock)
+    # search for errors and save them as StructuredError (for scoring runs see submission_scoring.rb)
+    extract_errors
+
     # save the output of this "run" as a "testrun" (scoring runs are saved in submission_scoring.rb)
     save_run_output
 
@@ -199,6 +202,17 @@ class SubmissionsController < ApplicationController
     tubesock.close
   end
 
+  def extract_errors
+    if !@message_buffer.blank?
+      @submission.exercise.execution_environment.error_templates.each do |template|
+        pattern = Regexp.new(template.signature).freeze
+        if pattern.match(@message_buffer)
+          StructuredError.create_from_template(template, @message_buffer)
+        end
+      end
+    end
+  end
+
   def handle_message(message, tubesock, container)
     @run_output ||= ""
     # Handle special commands first
diff --git a/app/helpers/error_template_attributes_helper.rb b/app/helpers/error_template_attributes_helper.rb
new file mode 100644
index 00000000..9046f407
--- /dev/null
+++ b/app/helpers/error_template_attributes_helper.rb
@@ -0,0 +1,2 @@
+module ErrorTemplateAttributesHelper
+end
diff --git a/app/helpers/error_templates_helper.rb b/app/helpers/error_templates_helper.rb
new file mode 100644
index 00000000..f42cf302
--- /dev/null
+++ b/app/helpers/error_templates_helper.rb
@@ -0,0 +1,2 @@
+module ErrorTemplatesHelper
+end
diff --git a/app/models/error_template.rb b/app/models/error_template.rb
new file mode 100644
index 00000000..be4a3279
--- /dev/null
+++ b/app/models/error_template.rb
@@ -0,0 +1,8 @@
+class ErrorTemplate < ActiveRecord::Base
+  belongs_to :execution_environment
+  has_and_belongs_to_many :error_template_attributes
+
+  def to_s
+    "#{id} [#{name}]"
+  end
+end
diff --git a/app/models/error_template_attribute.rb b/app/models/error_template_attribute.rb
new file mode 100644
index 00000000..844c1019
--- /dev/null
+++ b/app/models/error_template_attribute.rb
@@ -0,0 +1,7 @@
+class ErrorTemplateAttribute < ActiveRecord::Base
+  has_and_belongs_to_many :error_template
+
+  def to_s
+    "#{id} [#{key}]"
+  end
+end
diff --git a/app/models/execution_environment.rb b/app/models/execution_environment.rb
index 3a4efdde..74177173 100644
--- a/app/models/execution_environment.rb
+++ b/app/models/execution_environment.rb
@@ -11,6 +11,7 @@ class ExecutionEnvironment < ActiveRecord::Base
   has_many :exercises
   belongs_to :file_type
   has_many :hints
+  has_many :error_templates
 
   scope :with_exercises, -> { where('id IN (SELECT execution_environment_id FROM exercises)') }
 
diff --git a/app/models/structured_error.rb b/app/models/structured_error.rb
new file mode 100644
index 00000000..2f03ec54
--- /dev/null
+++ b/app/models/structured_error.rb
@@ -0,0 +1,12 @@
+class StructuredError < ActiveRecord::Base
+  belongs_to :error_template
+  belongs_to :file, class_name: 'CodeOcean::File'
+
+  def self.create_from_template(template, message_buffer)
+    instance = self.create(error_template: template)
+    template.error_template_attributes.each do |attribute|
+      StructuredErrorAttribute.create_from_template(attribute, instance, message_buffer)
+    end
+    instance
+  end
+end
diff --git a/app/models/structured_error_attribute.rb b/app/models/structured_error_attribute.rb
new file mode 100644
index 00000000..6eb17fc4
--- /dev/null
+++ b/app/models/structured_error_attribute.rb
@@ -0,0 +1,17 @@
+class StructuredErrorAttribute < ActiveRecord::Base
+  belongs_to :structured_error
+  belongs_to :error_template_attribute
+
+  def self.create_from_template(attribute, structured_error, message_buffer)
+    match = false
+    value = nil
+    result = message_buffer.match(attribute.regex)
+    if result != nil
+      match = true
+      if result.captures.size > 0
+        value = result.captures[0]
+      end
+    end
+    self.create(structured_error: structured_error, error_template_attribute: attribute, value: value, match: match)
+  end
+end
diff --git a/app/policies/error_template_attribute_policy.rb b/app/policies/error_template_attribute_policy.rb
new file mode 100644
index 00000000..eed0896d
--- /dev/null
+++ b/app/policies/error_template_attribute_policy.rb
@@ -0,0 +1,3 @@
+class ErrorTemplateAttributePolicy < AdminOnlyPolicy
+
+end
diff --git a/app/policies/error_template_policy.rb b/app/policies/error_template_policy.rb
new file mode 100644
index 00000000..908be08e
--- /dev/null
+++ b/app/policies/error_template_policy.rb
@@ -0,0 +1,9 @@
+class ErrorTemplatePolicy < AdminOnlyPolicy
+  def add_attribute?
+    admin?
+  end
+
+  def remove_attribute?
+    admin?
+  end
+end
diff --git a/app/views/application/_navigation.html.slim b/app/views/application/_navigation.html.slim
index 19f10a85..668ccab4 100644
--- a/app/views/application/_navigation.html.slim
+++ b/app/views/application/_navigation.html.slim
@@ -8,7 +8,8 @@
         - if current_user.admin?
           li = link_to(t('breadcrumbs.dashboard.show'), admin_dashboard_path)
           li.divider
-        - models = [ExecutionEnvironment, Exercise, ExerciseCollection, ProxyExercise, Tag, Consumer, CodeHarborLink, ExternalUser, FileType, FileTemplate, InternalUser].sort_by { |model| model.model_name.human(count: 2) }
+        - models = [ExecutionEnvironment, Exercise, ExerciseCollection, ProxyExercise, Tag, Consumer, CodeHarborLink,
+                ErrorTemplate, ErrorTemplateAttribute, ExternalUser, FileType, FileTemplate, InternalUser].sort_by {|model| model.model_name.human(count: 2) }
         - models.each do |model|
           - if policy(model).index?
             li = link_to(model.model_name.human(count: 2), send(:"#{model.model_name.collection}_path"))
diff --git a/app/views/error_template_attributes/_form.html.slim b/app/views/error_template_attributes/_form.html.slim
new file mode 100644
index 00000000..4fc28b02
--- /dev/null
+++ b/app/views/error_template_attributes/_form.html.slim
@@ -0,0 +1,16 @@
+= form_for(@error_template_attribute) do |f|
+  = render('shared/form_errors', object: @error_template_attribute)
+  .form-group
+    = f.label(:key)
+    = f.text_field(:key, class: 'form-control', required: true)
+  .form-group
+    = f.label(:description)
+    = f.text_field(:description, class: 'form-control')
+  .form-group
+    = f.label(:regex)
+    = f.text_field(:regex, class: 'form-control', required: true)
+    .help-block == t('error_templates.hints.signature')
+  .form-group
+    = f.check_box(:important)
+    = t('activerecord.attributes.error_template_attribute.important')
+  .actions = render('shared/submit_button', f: f, object: @error_template_attribute)
diff --git a/app/views/error_template_attributes/edit.html.slim b/app/views/error_template_attributes/edit.html.slim
new file mode 100644
index 00000000..f3279442
--- /dev/null
+++ b/app/views/error_template_attributes/edit.html.slim
@@ -0,0 +1,3 @@
+h1 = @error_template_attribute
+
+= render('form')
diff --git a/app/views/error_template_attributes/index.html.slim b/app/views/error_template_attributes/index.html.slim
new file mode 100644
index 00000000..81d5cac9
--- /dev/null
+++ b/app/views/error_template_attributes/index.html.slim
@@ -0,0 +1,28 @@
+h1 = ErrorTemplateAttribute.model_name.human(count: 2)
+
+.table-responsive
+  table.sortable.table
+    thead
+      tr
+        th
+        th = t('activerecord.attributes.error_template_attribute.key')
+        th = t('activerecord.attributes.error_template_attribute.description')
+        th = t('activerecord.attributes.error_template_attribute.regex')
+        th colspan=5 = t('shared.actions')
+    tbody
+      - @error_template_attributes.each do |error_template_attribute|
+        tr
+          td
+            - if error_template_attribute.important
+              span class="fa fa-star" aria-hidden="true"
+            - else
+              span class="fa fa-star-o" aria-hidden="true"
+          td = error_template_attribute.key
+          td = error_template_attribute.description
+          td = error_template_attribute.regex
+          td = link_to(t('shared.show'), error_template_attribute)
+          td = link_to(t('shared.edit'), edit_error_template_attribute_path(error_template_attribute))
+          td = link_to(t('shared.destroy'), error_template_attribute, data: {confirm: t('shared.confirm_destroy')}, method: :delete)
+
+= render('shared/pagination', collection: @error_template_attributes)
+p = render('shared/new_button', model: ErrorTemplateAttribute)
diff --git a/app/views/error_template_attributes/new.html.slim b/app/views/error_template_attributes/new.html.slim
new file mode 100644
index 00000000..12c719f9
--- /dev/null
+++ b/app/views/error_template_attributes/new.html.slim
@@ -0,0 +1,3 @@
+h1 = t('shared.new_model', model: ErrorTemplateAttribute.model_name.human)
+
+= render('form')
diff --git a/app/views/error_template_attributes/show.html.slim b/app/views/error_template_attributes/show.html.slim
new file mode 100644
index 00000000..2bdd01ca
--- /dev/null
+++ b/app/views/error_template_attributes/show.html.slim
@@ -0,0 +1,8 @@
+h1
+  = @error_template_attribute
+  = render('shared/edit_button', object: @error_template_attribute)
+
+- [:key, :description, :regex, :important].each do |attribute|
+  = row(label: "error_template_attribute.#{attribute}", value: @error_template_attribute.send(attribute))
+
+// todo: used by
diff --git a/app/views/error_templates/_form.html.slim b/app/views/error_templates/_form.html.slim
new file mode 100644
index 00000000..f9363155
--- /dev/null
+++ b/app/views/error_templates/_form.html.slim
@@ -0,0 +1,19 @@
+= form_for(@error_template) do |f|
+  = render('shared/form_errors', object: @error_template)
+  .form-group
+    = f.label(:name)
+    = f.text_field(:name, class: 'form-control', required: true)
+  .form-group
+    = f.label(:execution_environment_id)
+    = f.collection_select(:execution_environment_id, ExecutionEnvironment.all.order(:name), :id, :name, {include_blank: false}, class: 'form-control')
+  .form-group
+    = f.label(:signature)
+    = f.text_field(:signature, class: 'form-control')
+    .help-block == t('error_templates.hints.signature')
+  .form-group
+    = f.label(:description)
+    = f.text_field(:description, class: 'form-control')
+  .form-group
+    = f.label(:hint)
+    = f.text_field(:hint, class: 'form-control')
+  .actions = render('shared/submit_button', f: f, object: @error_template)
diff --git a/app/views/error_templates/edit.html.slim b/app/views/error_templates/edit.html.slim
new file mode 100644
index 00000000..2d12b363
--- /dev/null
+++ b/app/views/error_templates/edit.html.slim
@@ -0,0 +1,3 @@
+h1 = @error_template
+
+= render('form')
diff --git a/app/views/error_templates/index.html.slim b/app/views/error_templates/index.html.slim
new file mode 100644
index 00000000..f44b3f67
--- /dev/null
+++ b/app/views/error_templates/index.html.slim
@@ -0,0 +1,22 @@
+h1 = ErrorTemplate.model_name.human(count: 2)
+
+.table-responsive
+  table.sortable.table
+    thead
+      tr
+        th = t('activerecord.attributes.error_template.name')
+        th = t('activerecord.attributes.error_template.description')
+        th = t('activerecord.attributes.exercise.execution_environment')
+        th colspan=3 = t('shared.actions')
+    tbody
+      - @error_templates.each do |error_template|
+        tr
+          td = error_template.name
+          td = error_template.description
+          td = link_to(error_template.execution_environment)
+          td = link_to(t('shared.show'), error_template)
+          td = link_to(t('shared.edit'), edit_error_template_path(error_template))
+          td = link_to(t('shared.destroy'), error_template, data: {confirm: t('shared.confirm_destroy')}, method: :delete)
+
+= render('shared/pagination', collection: @error_templates)
+p = render('shared/new_button', model: ErrorTemplate)
diff --git a/app/views/error_templates/new.html.slim b/app/views/error_templates/new.html.slim
new file mode 100644
index 00000000..eeecadc8
--- /dev/null
+++ b/app/views/error_templates/new.html.slim
@@ -0,0 +1,3 @@
+h1 = t('shared.new_model', model: ErrorTemplate.model_name.human)
+
+= render('form')
diff --git a/app/views/error_templates/show.html.slim b/app/views/error_templates/show.html.slim
new file mode 100644
index 00000000..9936ef7f
--- /dev/null
+++ b/app/views/error_templates/show.html.slim
@@ -0,0 +1,40 @@
+h1
+  = @error_template
+  = render('shared/edit_button', object: @error_template)
+
+= row(label: 'error_template.name', value: @error_template.name)
+= row(label: 'exercise.execution_environment', value: link_to(@error_template.execution_environment))
+- [:signature, :description, :hint].each do |attribute|
+  = row(label: "error_template.#{attribute}", value: @error_template.send(attribute))
+
+h3
+  = t 'error_templates.attributes'
+
+.table-responsive
+  table.sortable.table
+    thead
+      tr
+        th
+        th = t('activerecord.attributes.error_template_attribute.key')
+        th = t('activerecord.attributes.error_template_attribute.description')
+        th = t('activerecord.attributes.error_template_attribute.regex')
+        th colspan=3 = t('shared.actions')
+    tbody
+      - @error_template.error_template_attributes.order('important DESC', :key).each do |attribute|
+        tr
+          td
+            - if attribute.important
+              span class="fa fa-star" aria-hidden="true"
+            - else
+              span class="fa fa-star-o" aria-hidden="true"
+          td = attribute.key
+          td = attribute.description
+          td = attribute.regex
+          td = link_to(t('shared.show'), attribute)
+          td = link_to(t('shared.destroy'), attribute_error_template_url(:error_template_attribute_id => attribute.id), :method => :delete)
+
+#add-attribute
+  = collection_select({}, :error_template_attribute_id,
+          ErrorTemplateAttribute.where.not(id: @error_template.error_template_attributes.select(:id).to_a).order('important DESC', :key),
+          :id, :key, {include_blank: false}, class: '')
+  button.btn.btn-default = t('error_templates.add_attribute')
diff --git a/config/locales/de.yml b/config/locales/de.yml
index 1e2b2337..afeea353 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -111,6 +111,16 @@ de:
         name: "Name"
         file_type: "Dateityp"
         content: "Code"
+      error_template:
+        name: Name
+        signature: Regulärer Ausdruck
+        description: Beschreibung
+        hint: Hinweis
+      error_template_attribute:
+        important: "Wichtig"
+        key: "Name"
+        description: "Beschreibung"
+        regex: "Regulärer Ausdruck"
       exercise_collections:
         id: "ID"
         name: "Name"
@@ -126,6 +136,12 @@ de:
       error:
         one: Fehler
         other: Fehler
+      error_template:
+        one: Fehlertemplate
+        other: Fehlertemplates
+      error_template_attribute:
+        one: Fehlertemplatettribut
+        other: Fehlertemplatettribute
       execution_environment:
         one: Ausführungsumgebung
         other: Ausführungsumgebungen
@@ -642,10 +658,14 @@ de:
     estimated_time_20_to_30: "zwischen 20 und 30 Minuten"
     estimated_time_more_30: "mehr als 30 Minuten"
     working_time: "Geschätze Bearbeitungszeit für diese Aufgabe:"
+  error_templates:
+    hints:
+      signature: "Ein regulärer Ausdruck in Ruby-Syntax und ohne führende und schließende \"/\""
+    attributes: "Attribute"
+    add_attribute: "Attribut hinzufügen"
   comments:
     deleted: "Gelöscht"
     save_update: "Speichern"
   subscriptions:
     successfully_unsubscribed: "Ihr Abonnement für weitere Kommentare auf dieser Kommentaranfrage wurde erfolgreich beendet."
     subscription_not_existent: "Das Abonnement, von dem Sie sich abmelden wollen, existiert nicht."
-
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c55c90b0..6c1d91fd 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -111,6 +111,16 @@ en:
         name: "Name"
         file_type: "File Type"
         content: "Content"
+      error_template:
+        name: Name
+        signature: Signature Regular Expression
+        description: Description
+        hint: Hint
+      error_template_attribute:
+        important: "Important"
+        key: "Identifier"
+        description: "Description"
+        regex: "Regular Expression"
       exercise_collections:
         id: "ID"
         name: "Name"
@@ -126,6 +136,12 @@ en:
       error:
         one: Error
         other: Errors
+      error_template:
+        one: Error Template
+        other: Error Templates
+      error_template_attribute:
+        one: Error Template Attribute
+        other: Error Template Attributes
       execution_environment:
         one: Execution Environment
         other: Execution Environments
@@ -642,6 +658,11 @@ en:
     estimated_time_20_to_30: "between 20 and 30 minutes"
     estimated_time_more_30: "more than 30 minutes"
     working_time: "Estimated time working on this exercise:"
+  error_templates:
+    hints:
+      signature: "A regular expression in Ruby syntax without leading and trailing \"/\""
+    attributes: "Attributes"
+    add_attribute: "Add attribute"
   comments:
     deleted: "Deleted"
     save_update: "Save"
diff --git a/config/routes.rb b/config/routes.rb
index 7f254f1d..b6fef404 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,6 +1,13 @@
 FILENAME_REGEXP = /[\w\.]+/ unless Kernel.const_defined?(:FILENAME_REGEXP)
 
 Rails.application.routes.draw do
+  resources :error_template_attributes
+  resources :error_templates do
+    member do
+      put 'attribute', to: 'error_templates#add_attribute'
+      delete 'attribute', to: 'error_templates#remove_attribute'
+    end
+  end
   resources :file_templates do
     collection do
       get 'by_file_type/:file_type_id', as: :by_file_type, action: :by_file_type
diff --git a/db/migrate/20170703075832_create_error_templates.rb b/db/migrate/20170703075832_create_error_templates.rb
new file mode 100644
index 00000000..6f442842
--- /dev/null
+++ b/db/migrate/20170703075832_create_error_templates.rb
@@ -0,0 +1,11 @@
+class CreateErrorTemplates < ActiveRecord::Migration
+  def change
+    create_table :error_templates do |t|
+      t.belongs_to :execution_environment
+      t.string :name
+      t.string :signature
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20170703075959_create_error_template_attributes.rb b/db/migrate/20170703075959_create_error_template_attributes.rb
new file mode 100644
index 00000000..3503fcac
--- /dev/null
+++ b/db/migrate/20170703075959_create_error_template_attributes.rb
@@ -0,0 +1,11 @@
+class CreateErrorTemplateAttributes < ActiveRecord::Migration
+  def change
+    create_table :error_template_attributes do |t|
+      t.belongs_to :error_template
+      t.string :key
+      t.string :regex
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20170703080205_create_structured_errors.rb b/db/migrate/20170703080205_create_structured_errors.rb
new file mode 100644
index 00000000..560649b4
--- /dev/null
+++ b/db/migrate/20170703080205_create_structured_errors.rb
@@ -0,0 +1,10 @@
+class CreateStructuredErrors < ActiveRecord::Migration
+  def change
+    create_table :structured_errors do |t|
+      t.references :error_template
+      t.belongs_to :file
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20170703080355_create_structured_error_attributes.rb b/db/migrate/20170703080355_create_structured_error_attributes.rb
new file mode 100644
index 00000000..aa9ee04e
--- /dev/null
+++ b/db/migrate/20170703080355_create_structured_error_attributes.rb
@@ -0,0 +1,11 @@
+class CreateStructuredErrorAttributes < ActiveRecord::Migration
+  def change
+    create_table :structured_error_attributes do |t|
+      t.belongs_to :structured_error
+      t.references :error_template_attribute
+      t.string :value
+
+      t.timestamps null: false
+    end
+  end
+end
diff --git a/db/migrate/20170711170456_add_description_and_hint_to_error_template.rb b/db/migrate/20170711170456_add_description_and_hint_to_error_template.rb
new file mode 100644
index 00000000..62cbee95
--- /dev/null
+++ b/db/migrate/20170711170456_add_description_and_hint_to_error_template.rb
@@ -0,0 +1,9 @@
+class AddDescriptionAndHintToErrorTemplate < ActiveRecord::Migration
+  def change
+    add_column :error_templates, :description, :text
+    add_column :error_templates, :hint, :text
+
+    add_column :error_template_attributes, :description, :text
+    add_column :error_template_attributes, :important, :boolean
+  end
+end
diff --git a/db/migrate/20170711170928_change_error_template_attribute_relationship_to_n_to_m.rb b/db/migrate/20170711170928_change_error_template_attribute_relationship_to_n_to_m.rb
new file mode 100644
index 00000000..d10fbda2
--- /dev/null
+++ b/db/migrate/20170711170928_change_error_template_attribute_relationship_to_n_to_m.rb
@@ -0,0 +1,6 @@
+class ChangeErrorTemplateAttributeRelationshipToNToM < ActiveRecord::Migration
+  def change
+    remove_belongs_to :error_template_attributes, :error_template
+    create_join_table :error_templates, :error_template_attributes
+  end
+end
diff --git a/db/migrate/20170719133351_add_match_to_structured_error_attribute.rb b/db/migrate/20170719133351_add_match_to_structured_error_attribute.rb
new file mode 100644
index 00000000..7ec3ccc0
--- /dev/null
+++ b/db/migrate/20170719133351_add_match_to_structured_error_attribute.rb
@@ -0,0 +1,5 @@
+class AddMatchToStructuredErrorAttribute < ActiveRecord::Migration
+  def change
+    add_column :structured_error_attributes, :match, :boolean
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 988cd447..465ca604 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -47,6 +47,30 @@ ActiveRecord::Schema.define(version: 20170920145852) do
     t.string   "oauth_secret", limit: 255
   end
 
+  create_table "error_template_attributes", force: :cascade do |t|
+    t.string   "key"
+    t.string   "regex"
+    t.datetime "created_at",  null: false
+    t.datetime "updated_at",  null: false
+    t.text     "description"
+    t.boolean  "important"
+  end
+
+  create_table "error_template_attributes_templates", id: false, force: :cascade do |t|
+    t.integer "error_template_id",           null: false
+    t.integer "error_template_attribute_id", null: false
+  end
+
+  create_table "error_templates", force: :cascade do |t|
+    t.integer  "execution_environment_id"
+    t.string   "name"
+    t.string   "signature"
+    t.datetime "created_at",               null: false
+    t.datetime "updated_at",               null: false
+    t.text     "description"
+    t.text     "hint"
+  end
+
   create_table "errors", force: :cascade do |t|
     t.integer  "execution_environment_id"
     t.text     "message"
@@ -268,6 +292,22 @@ ActiveRecord::Schema.define(version: 20170920145852) do
     t.datetime "updated_at"
   end
 
+  create_table "structured_error_attributes", force: :cascade do |t|
+    t.integer  "structured_error_id"
+    t.integer  "error_template_attribute_id"
+    t.string   "value"
+    t.datetime "created_at",                  null: false
+    t.datetime "updated_at",                  null: false
+    t.boolean  "match"
+  end
+
+  create_table "structured_errors", force: :cascade do |t|
+    t.integer  "error_template_id"
+    t.integer  "file_id"
+    t.datetime "created_at",        null: false
+    t.datetime "updated_at",        null: false
+  end
+
   create_table "submissions", force: :cascade do |t|
     t.integer  "exercise_id"
     t.float    "score"
diff --git a/test/controllers/error_template_attributes_controller_test.rb b/test/controllers/error_template_attributes_controller_test.rb
new file mode 100644
index 00000000..7dd008ec
--- /dev/null
+++ b/test/controllers/error_template_attributes_controller_test.rb
@@ -0,0 +1,49 @@
+require 'test_helper'
+
+class ErrorTemplateAttributesControllerTest < ActionController::TestCase
+  setup do
+    @error_template_attribute = error_template_attributes(:one)
+  end
+
+  test "should get index" do
+    get :index
+    assert_response :success
+    assert_not_nil assigns(:error_template_attributes)
+  end
+
+  test "should get new" do
+    get :new
+    assert_response :success
+  end
+
+  test "should create error_template_attribute" do
+    assert_difference('ErrorTemplateAttribute.count') do
+      post :create, error_template_attribute: {  }
+    end
+
+    assert_redirected_to error_template_attribute_path(assigns(:error_template_attribute))
+  end
+
+  test "should show error_template_attribute" do
+    get :show, id: @error_template_attribute
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get :edit, id: @error_template_attribute
+    assert_response :success
+  end
+
+  test "should update error_template_attribute" do
+    patch :update, id: @error_template_attribute, error_template_attribute: {  }
+    assert_redirected_to error_template_attribute_path(assigns(:error_template_attribute))
+  end
+
+  test "should destroy error_template_attribute" do
+    assert_difference('ErrorTemplateAttribute.count', -1) do
+      delete :destroy, id: @error_template_attribute
+    end
+
+    assert_redirected_to error_template_attributes_path
+  end
+end
diff --git a/test/controllers/error_templates_controller_test.rb b/test/controllers/error_templates_controller_test.rb
new file mode 100644
index 00000000..452ad134
--- /dev/null
+++ b/test/controllers/error_templates_controller_test.rb
@@ -0,0 +1,49 @@
+require 'test_helper'
+
+class ErrorTemplatesControllerTest < ActionController::TestCase
+  setup do
+    @error_template = error_templates(:one)
+  end
+
+  test "should get index" do
+    get :index
+    assert_response :success
+    assert_not_nil assigns(:error_templates)
+  end
+
+  test "should get new" do
+    get :new
+    assert_response :success
+  end
+
+  test "should create error_template" do
+    assert_difference('ErrorTemplate.count') do
+      post :create, error_template: {  }
+    end
+
+    assert_redirected_to error_template_path(assigns(:error_template))
+  end
+
+  test "should show error_template" do
+    get :show, id: @error_template
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get :edit, id: @error_template
+    assert_response :success
+  end
+
+  test "should update error_template" do
+    patch :update, id: @error_template, error_template: {  }
+    assert_redirected_to error_template_path(assigns(:error_template))
+  end
+
+  test "should destroy error_template" do
+    assert_difference('ErrorTemplate.count', -1) do
+      delete :destroy, id: @error_template
+    end
+
+    assert_redirected_to error_templates_path
+  end
+end
diff --git a/test/factories/error_template_attributes.rb b/test/factories/error_template_attributes.rb
new file mode 100644
index 00000000..24adb856
--- /dev/null
+++ b/test/factories/error_template_attributes.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :error_template_attribute do
+    error_template nil
+    key "MyString"
+    regex "MyString"
+  end
+end
diff --git a/test/factories/error_templates.rb b/test/factories/error_templates.rb
new file mode 100644
index 00000000..2abf68c9
--- /dev/null
+++ b/test/factories/error_templates.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :error_template do
+    execution_environment nil
+    name "MyString"
+    signature "MyString"
+  end
+end
diff --git a/test/factories/structured_error_attributes.rb b/test/factories/structured_error_attributes.rb
new file mode 100644
index 00000000..7485967c
--- /dev/null
+++ b/test/factories/structured_error_attributes.rb
@@ -0,0 +1,7 @@
+FactoryGirl.define do
+  factory :structured_error_attribute do
+    structured_error nil
+    error_template_attribute nil
+    value "MyString"
+  end
+end
diff --git a/test/factories/structured_errors.rb b/test/factories/structured_errors.rb
new file mode 100644
index 00000000..4a87cec1
--- /dev/null
+++ b/test/factories/structured_errors.rb
@@ -0,0 +1,6 @@
+FactoryGirl.define do
+  factory :structured_error do
+    error_template nil
+    file nil
+  end
+end
diff --git a/test/models/error_template_attribute_test.rb b/test/models/error_template_attribute_test.rb
new file mode 100644
index 00000000..187ae1b7
--- /dev/null
+++ b/test/models/error_template_attribute_test.rb
@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class ErrorTemplateAttributeTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end
diff --git a/test/models/error_template_test.rb b/test/models/error_template_test.rb
new file mode 100644
index 00000000..538dc19a
--- /dev/null
+++ b/test/models/error_template_test.rb
@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class ErrorTemplateTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end
diff --git a/test/models/structured_error_attribute_test.rb b/test/models/structured_error_attribute_test.rb
new file mode 100644
index 00000000..1dcb316b
--- /dev/null
+++ b/test/models/structured_error_attribute_test.rb
@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class StructuredErrorAttributeTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end
diff --git a/test/models/structured_error_test.rb b/test/models/structured_error_test.rb
new file mode 100644
index 00000000..28b03689
--- /dev/null
+++ b/test/models/structured_error_test.rb
@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class StructuredErrorTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end