diff --git a/core/entities/Graph.js b/core/entities/Graph.js
new file mode 100644
index 0000000..e69de29
diff --git a/core/entities/Node.js b/core/entities/Node.js
new file mode 100644
index 0000000..d632419
--- /dev/null
+++ b/core/entities/Node.js
@@ -0,0 +1,119 @@
+class Node {
+  constructor (props) {
+    const validatePropsResponse = this._validateConstructionProps(props)
+    if (validatePropsResponse.status === 'ERR') {
+      this.isValid = false
+      throw validatePropsResponse
+    }
+    else {
+      this._assignProps(props)
+    }
+  }
+
+  getProperties = () => {
+    let tables = []
+    if (!Array.isArray(this.tables)) tables = []
+    else if (this.tables.length === 0) tables = []
+    else tables = this.tables.map(t => {
+      return t.getProperties()
+    })
+
+    const properties = {
+      id: this.id,
+      label: this.label,
+      type: this.type,
+      tables: tables,
+      isValid: this.isValid
+    }
+
+    return properties
+  }
+
+  importTables = tablesToImport => {
+    const validateTablesResponse = this._validateTables(tablesToImport)
+    if (validateTablesResponse.status === 'ERR') {
+      throw validateTablesResponse
+    } else {
+      let tables = []
+      if (!Array.isArray(tablesToImport)) tables = [tablesToImport]
+      else tables = tablesToImport
+      this.tables = tables
+    }
+  }
+  
+  _assignProps = props => {
+    this.id = props.id
+    this.label = props.label
+    this.type = 'Node'
+
+    if (props.tables) {
+      try {
+        const validateTablesResponse = this._validateTables(props.tables)
+        if (validateTablesResponse.status === 'ERR') {
+          throw validateTablesResponse
+        } else {
+          let tables = []
+          if (!Array.isArray(props.tables)) tables = [props.tables]
+          else tables = props.tables
+          this.tables = tables
+        }
+      } catch (err) {
+        throw err
+      }
+    } else {
+      this.tables = []
+    }
+    
+    this.isValid = true
+  }
+
+  _validateTables = tablesToImport => {
+    const err = {
+      status: 'ERR',
+      error: {
+        label: 'Not all imported Tables are valid',
+        messages: []
+      }
+    }
+
+    let tables = []
+    if (!tablesToImport) {
+      err.error.messages.push('No Tables imported')
+      return err
+    } else if (!Array.isArray(tablesToImport)) {
+      tables = [tablesToImport]
+    } else tables = tablesToImport
+
+    for (let t = 0; t < tables.length; t++) {
+      if (!tables[t].isValid) {
+        err.error.messages.push(`Table[${t}] is not valid`)
+      }
+    }
+
+    if (err.error.messages.length === 0){
+      return { status: 'OK' }
+    } else{
+      return err
+    }
+  }
+
+  _validateConstructionProps = (props) => {
+    const err = {
+      status: 'ERR',
+      error: {
+        label: 'Error Creating Node',
+        messages: []
+      }
+    }
+    if (!props.id) err.error.messages.push('No id on creation of Node')
+    if (!props.label) err.error.messages.push('No label on creation of Node')
+  
+    if (err.error.messages.length === 0){
+      return { status: 'OK' }
+    } else{
+      return err
+    }
+  }
+}
+
+export default Node
diff --git a/core/entities/Table.js b/core/entities/Table.js
new file mode 100644
index 0000000..58442c2
--- /dev/null
+++ b/core/entities/Table.js
@@ -0,0 +1,86 @@
+class Table {
+  constructor (props) {
+    const validatePropsResponse = this._validateConstructionProps(props)
+    if (validatePropsResponse.status === 'ERR') {
+      this.isValid = false
+      throw validatePropsResponse
+    }
+    else {
+      this._assignProps(props)
+    }
+  }
+
+  getProperties = () => {
+    return {
+      id: this.id,
+      label: this.label,
+      rows: this.rows,
+      type: this.type,
+      isValid: this.isValid
+    }
+  }
+
+  getRows = () => this.rows
+
+  _assignProps = props => {
+    this.id = props.id
+    this.label = props.label
+    this.type = 'Table' 
+    this.isValid = true
+
+    if (!Array.isArray(props.rows)) this.rows = [props.rows]
+    else this.rows = props.rows
+  }
+
+  _validateConstructionProps = props => {
+    const err = {
+      status: 'ERR',
+      error: {
+        label: 'Error Creating Table',
+        messages: []
+      }
+    }
+
+    if(!props) {
+      err.error.messages.push('No props on creation of Table')
+      return err
+    }
+    if (!props.id) err.error.messages.push('No id on creation of Table')
+    if (!props.label) err.error.messages.push('No label on creation of Table')
+
+    const validateRowsErrors = this._validateRows(props.rows)
+    if (validateRowsErrors.length > 0) {
+      validateRowsErrors.forEach(e => {
+        err.error.messages.push(e)
+      })
+    }
+  
+    if (err.error.messages.length === 0){
+      return { status: 'OK' }
+    } else{
+      return err
+    }
+  }
+
+  _validateRows = rowsToImport => {
+    let rows = []
+    if (!Array.isArray(rowsToImport)) rows = [rowsToImport]
+    else rows = rowsToImport
+
+    const errorMesages = []
+
+    if (rows.length === 0) {
+      errorMesages.push('No Tables imported')
+    }
+
+    for (let r = 0; r < rows.length; r++) {
+      if (typeof rows[r] !== 'object') {
+        errorMesages.push(`row[${r}] is not an object`)
+      }
+    }
+
+    return errorMesages
+  }
+}
+
+export default Table
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..9e20cb7
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,14 @@
+{
+  "name": "dmein",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "progress": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/progress/-/progress-2.0.3.tgz",
+      "integrity": "sha512-7PiHtLll5LdnKIMw100I+8xJXR5gW2QwWYkT6iJva0bXitZKa/XMrSbdmg3r2Xnaidz9Qumd0VPaMrZlF9V9sA==",
+      "dev": true
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..5114eb6
--- /dev/null
+++ b/package.json
@@ -0,0 +1,26 @@
+{
+  "name": "dmein",
+  "version": "1.0.0",
+  "type": "module",
+  "description": "A web application to migrate data from various sources (i.e. files, DBs, APIs) and create visual reports on them.",
+  "main": "index.js",
+  "directories": {
+    "test": "tests"
+  },
+  "scripts": {
+    "tests": "node ./tests/index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/joshuashoemaker/dmein.git"
+  },
+  "author": "Joshua Shoemaker",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/joshuashoemaker/dmein/issues"
+  },
+  "homepage": "https://github.com/joshuashoemaker/dmein#readme",
+  "devDependencies": {
+    "progress": "^2.0.3"
+  }
+}
diff --git a/tests/core/nodeTests.js b/tests/core/nodeTests.js
new file mode 100644
index 0000000..da54f3e
--- /dev/null
+++ b/tests/core/nodeTests.js
@@ -0,0 +1,108 @@
+import Node from '../../core/entities/Node.js'
+import Table from '../../core/entities/Table.js'
+
+const input = {
+  id: 'ABC',
+  label: 'Test Node',
+  tables: [
+    new Table({
+      id: 'XYZ',
+      label: 'Test Table',
+      rows: [{ id: 'abc', data: 'row' }]
+    })
+  ]
+}
+
+const getNodeProperties = () => {
+  const expectedOutput = {
+    id: 'ABC',
+    label: 'Test Node',
+    type: 'Node',
+    tables: [
+      {
+        id: 'XYZ',
+        label: 'Test Table',
+        rows: [{ id: 'abc', data: 'row' }],
+        type: 'Table',
+        isValid: true
+      }
+    ],
+    isValid: true
+  }
+
+  try {
+    const node = new Node(input)
+    const nodeProps = node.getProperties()
+    if (JSON.stringify(nodeProps) == JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    return false
+  }
+}
+
+const createNodeWithoutTables = () => {
+  const input = {
+    id: 'ABC',
+    label: 'Test Node',
+  }
+
+  const expectedOutput = {
+    id: 'ABC',
+    label: 'Test Node',
+    type: 'Node',
+    tables: [],
+    isValid: true
+  }
+
+  try {
+    const node = new Node(input)
+    const nodeProps = node.getProperties()
+    if (JSON.stringify(nodeProps) == JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    return false
+  }
+}
+
+const importTables = () => {
+  const table = new Table({
+    id: 'XYZ',
+    label: 'Test Table',
+    rows: [{ id: 'abc', data: 'row' }]
+  })
+
+  const expectedOutput = {
+    id: 'ABC',
+    label: 'Test Node',
+    type: 'Node',
+    tables: [{
+      id: 'XYZ',
+      label: 'Test Table',
+      rows: [{ id: 'abc', data: 'row' }],
+      type: 'Table',
+      isValid: true
+    }],
+    isValid: true
+  }
+
+  try {
+    const node = new Node({
+      id: 'ABC',
+      label: 'Test Node',
+    })
+    node.importTables(table)
+    const nodeProps = node.getProperties()
+
+    if (JSON.stringify(nodeProps) == JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    console.log(err)
+    return false
+  }
+}
+
+export default [
+  { name: 'Entity | Get Node Properties', test: getNodeProperties },
+  { name: 'Entity | Create Node Without Tables', test: createNodeWithoutTables },
+  { name: 'Entity | Import Tables to Node', test: importTables }
+]
\ No newline at end of file
diff --git a/tests/core/tableTests.js b/tests/core/tableTests.js
new file mode 100644
index 0000000..97866a2
--- /dev/null
+++ b/tests/core/tableTests.js
@@ -0,0 +1,197 @@
+import Table from '../../core/entities/Table.js'
+
+const input = {
+  id: 'abc',
+  label: 'Test Label',
+  rows: [
+    { id: '2345676', type: 'row', lat: 54, long: 31 },
+    { id: '2345676', type: 'lh', lat: 31, long: -71.34 }
+  ]
+}
+
+const getTableProperties = () => {
+  const expectedOutput = {
+    id: 'abc',
+    label: 'Test Label',
+    rows: [
+      { id: '2345676', type: 'row', lat: 54, long: 31 },
+      { id: '2345676', type: 'lh', lat: 31, long: -71.34 }
+    ],
+    type: 'Table',
+    isValid: true
+  }
+
+  try {
+    const table = new Table(input)
+    const tableProperties = table.getProperties()
+    if (JSON.stringify(tableProperties) === JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    return err
+  }
+}
+
+const getTableRows = () => {
+  const expectedOutput = [
+    { id: '2345676', type: 'row', lat: 54, long: 31 },
+    { id: '2345676', type: 'lh', lat: 31, long: -71.34 }
+  ]
+
+  try {
+    const table = new Table(input)
+    const tableRows = table.getRows()
+    if (JSON.stringify(tableRows) === JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    return err
+  }
+}
+
+const createTableWithNoProps = () => {
+  const expectedOutput = {
+    status: 'ERR',
+    error: {
+      label: 'Error Creating Table',
+      messages: ['No props on creation of Table']
+    }
+  }
+
+  try {
+     new Table()
+     return false
+  } catch (err) {
+    if (JSON.stringify(expectedOutput) === JSON.stringify(err)) return true
+    else return false
+  }
+}
+
+const createTableWithOnlyId = () => {
+  const input = { id: 'abc' }
+  const expectedOutput = {
+    status: 'ERR',
+    error: {
+      label: 'Error Creating Table',
+      messages: [
+        'No label on creation of Table',
+        'row[0] is not an object'
+      ]
+    }
+  }
+
+  try {
+     new Table(input)
+     return false
+  } catch (err) {
+    if (JSON.stringify(expectedOutput) === JSON.stringify(err)) return true
+    else return false
+  }
+}
+
+const createTableWithOnlyLabel = () => {
+  const input = { label: 'Test Label' }
+  const expectedOutput = {
+    status: 'ERR',
+    error: {
+      label: 'Error Creating Table',
+      messages: [
+        'No id on creation of Table',
+        'row[0] is not an object'
+      ]
+    }
+  }
+
+  try {
+     new Table(input)
+     return false
+  } catch (err) {
+    if (JSON.stringify(expectedOutput) === JSON.stringify(err)) return true
+    else return false
+  }
+}
+
+const createTableWithEverythingButRows = () => {
+  const input = { id: 'abc', label: 'Test Label' }
+  const expectedOutput = {
+    status: 'ERR',
+    error: {
+      label: 'Error Creating Table',
+      messages: [
+        'row[0] is not an object'
+      ]
+    }
+  }
+
+  try {
+     new Table(input)
+     return false
+  } catch (err) {
+    if (JSON.stringify(expectedOutput) === JSON.stringify(err)) return true
+    else return false
+  }
+}
+
+const createTableWithInvalidRows = () => {
+  const input = {
+    id: 'abc',
+    label: 'Test Label',
+    rows: [
+      { id: '2345676', type: 'lh', lat: 31, long: -71.34 },
+      'fake row'
+    ]
+  }
+  const expectedOutput = {
+    status: 'ERR',
+    error: {
+      label: 'Error Creating Table',
+      messages: [
+        'row[1] is not an object'
+      ]
+    }
+  }
+
+  try {
+     new Table(input)
+     return false
+  } catch (err) {
+    if (JSON.stringify(expectedOutput) === JSON.stringify(err)) return true
+    else return false
+  }
+}
+
+const createTableWithRowsAsNotArray = () => {
+  const input = {
+    id: 'abc',
+    label: 'Test Label',
+    rows: { id: '2345676', type: 'lh', lat: 31, long: -71.34 }
+  }
+
+  const expectedOutput = {
+    id: 'abc',
+    label: 'Test Label',
+    rows: [
+      { id: '2345676', type: 'lh', lat: 31, long: -71.34 }
+    ],
+    type: 'Table',
+    isValid: true
+  }
+
+  try {
+    const table = new Table(input)
+    const tableProperties = table.getProperties()
+    if (JSON.stringify(tableProperties) === JSON.stringify(expectedOutput)) return true
+    else return false
+  } catch (err) {
+    return err
+  }
+}
+
+export default [
+  { name: 'Entity | Get Table Properties', test: getTableProperties },
+  { name: 'Entity | Get Table Rows', test: getTableRows },
+  { name: 'Entiry | Table With Invalid Props', test: createTableWithNoProps },
+  { name: 'Entiry | Table With Only Id', test: createTableWithOnlyId },
+  { name: 'Entiry | Table With Only Label', test: createTableWithOnlyLabel },
+  { name: 'Entiry | Table With Everything But Rows', test: createTableWithEverythingButRows },
+  { name: 'Entiry | Table With Invalid Rows', test: createTableWithInvalidRows },
+  { name: 'Entiry | Table With Rows as Not Array', test: createTableWithRowsAsNotArray }
+]
\ No newline at end of file
diff --git a/tests/index.js b/tests/index.js
new file mode 100644
index 0000000..1c8f8f2
--- /dev/null
+++ b/tests/index.js
@@ -0,0 +1,43 @@
+import ProgressBar from 'progress'
+
+import tableTests from '../tests/core/tableTests.js'
+import nodeTests from '../tests/core/nodeTests.js'
+
+function runTestsAndReturnFailures (tests) {
+  const testTotalCount = tests.length
+
+  const testBar = new ProgressBar(
+    `\x1b[36mRunning Tests [:bar] :current/${testTotalCount}`,
+    { total: testTotalCount }
+  )
+
+  let testsFailed = []
+
+  for (let i = 0; i < testTotalCount; i++) {
+    const passedTest = tests[i].test()
+    testBar.tick()
+
+    if (!passedTest) testsFailed.push(tests[i].name)
+    
+    if (testBar.complete) return testsFailed
+  }
+}
+
+function init (tests) {
+  const failedTestsResults = runTestsAndReturnFailures(tests)
+  if (failedTestsResults.length === 0) {
+    console.log('\x1b[32m%s\x1b[0m', 'All Tests Passed!!')
+  } else {
+    console.log(`\x1b[31mFailed ${failedTestsResults.length} tests.\x1b[0m`)
+    failedTestsResults.forEach(test => {
+      console.log(`\x1b[33m${test}\x1b[0m`)
+    })
+  }
+}
+
+const testsArray = [
+  tableTests,
+  nodeTests
+]
+
+init (testsArray.flat())
\ No newline at end of file