Usually, coordinate values are stored in numeric columns (float, decimal, or even integer), and the specific type will not affect the code presented here.
通常，坐标值存储在数字列中(浮点、小数，甚至是整数)，具体的类型并不影响这里给出的代码。
RDF literals can be given data types such as "integer", "string", "date", or even "morse code".
可以为 RDF 文字给定数据类型，如“整数”、“字符串”、“日期”或甚至是“莫尔斯代码”。
A Python variable is, internally, a complete structure, with lots of members — even when the object only represents an integer.
在内部，一个Python变量就是一个有许多成员组成的完整结构-即使当对象只代表一个整数时也是如此。
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