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Modeling data on web (5)
Modelling Data on the Web note 5: More error handling & RDF, a graph-based DMRobustnessIn computer science, robustness is the ability of a computer system to cope with errors during execution and cope with erroneous input.Formats for External ...…
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Modeling data on web (4)
Modelling Data on the Web note 4: XML Schema, XQuery, and robustnessTree data models Data Structure formalisms: XML (including name spaces) Schema Language: XML Schema (XSD) Data Manipulation: XQueryXML 有很多schema。可以通过 expressive power, easy of ...…
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Modeling data on web (3)
Modelling Data on the Web Week note 3 Tree Data ModelsTree data models Data Structure formalisms: XML (including name spaces) Schema Language: RelaxNG Data Manipulation: XPath, DOM and PythonXML a data model with a tree-shaped internal represe...…
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Modeling data on web (2)
modeling data on the web note 2 Tree data modelsTree Data Models Data Structure formalisms: JSON Schema Language: JSON Schema, CSVW Data Manipulation: Python, JSON packagesemi-structured data models当将数据存入RDBMS/TABLES中，将需要很多joins，递归（Recursive）jo...…
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Modeling data on web (1)
modeling data on the web note 1what is a (core) data model flat: CSV(format是text file), word table: relational table（table is the core data structure） tree based: XML graph based: RDFData structure unstructured data e.g., image, video, text. ...…
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Python实现邮件发送（1）必备工具
这个博客网站，是我扒别人的框架，正在修改中，有的功能不对，你们要小心点。必备工具 Amazon aws account AWS 中有个叫Amazon Simple Email Service，可以提供SMTP服务，达到第三方发送邮件的功能。 两个邮箱，一个用来发送，一个用来接收。在后续步骤中，将不再需要接收邮箱。 操作流程 前往AWS官网注册开发者账号 点我点我 在网页右上角(正常人都会注册吧。。) 注册完毕后登录，在AWS管理控制台中，...…
