要通过Apache Atlas访问创建词汇表、术语、分类和分类的功能，可以使用Apache Atlas的REST API进行操作。以下是一个使用Python编写的示例代码：

import requests
import json

# Apache Atlas的基本信息
atlas_host = "http://localhost:21000"
atlas_username = "admin"
atlas_password = "admin"

# 登录Apache Atlas获取令牌
def get_auth_token():
    url = f"{atlas_host}/api/atlas/v2/login"
    headers = {"Content-Type": "application/json"}

    data = {
        "username": atlas_username,
        "password": atlas_password
    }

    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 200:
        return response.json()["token"]
    else:
        raise Exception("Failed to get authentication token")

# 创建词汇表
def create_glossary():
    url = f"{atlas_host}/api/atlas/v2/glossary"
    headers = {"Content-Type": "application/json", "Authorization": f"Bearer {get_auth_token()}"}

    data = {
        "name": "My Glossary",
        "shortDescription": "This is a sample glossary",
        "longDescription": "This glossary contains terms and classifications"
    }

    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 201:
        return response.json()["guid"]
    else:
        raise Exception("Failed to create glossary")

# 创建术语
def create_term(glossary_guid):
    url = f"{atlas_host}/api/atlas/v2/glossary/{glossary_guid}/terms"
    headers = {"Content-Type": "application/json", "Authorization": f"Bearer {get_auth_token()}"}

    data = {
        "name": "Sample Term",
        "description": "This is a sample term",
        "glossaryGuid": glossary_guid
    }

    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 201:
        return response.json()["guid"]
    else:
        raise Exception("Failed to create term")

# 创建分类
def create_category(glossary_guid):
    url = f"{atlas_host}/api/atlas/v2/glossary/{glossary_guid}/categories"
    headers = {"Content-Type": "application/json", "Authorization": f"Bearer {get_auth_token()}"}

    data = {
        "name": "Sample Category",
        "description": "This is a sample category",
        "glossaryGuid": glossary_guid
    }

    response = requests.post(url, headers=headers, json=data)
    if response.status_code == 201:
        return response.json()["guid"]
    else:
        raise Exception("Failed to create category")

# 示例用法
glossary_guid = create_glossary()
term_guid = create_term(glossary_guid)
category_guid = create_category(glossary_guid)

print(f"Created glossary with GUID: {glossary_guid}")
print(f"Created term with GUID: {term_guid}")
print(f"Created category with GUID: {category_guid}")

请注意，上述代码中使用的atlas_host，atlas_username和atlas_password变量需要根据实际情况进行修改。此外，代码中的create_glossary，create_term和create_category函数分别用于创建词汇表、术语和分类，可以根据需要进行修改和扩展。