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Mohamed S., Senior XSLT Developer

Cairo, Egypt
Last Updated: 15 Mar 2024

- 11+ years of experience in IT - 10+ years of experience with XSLT/XML - Writing, testing and maintaining XSLT code that applies mapping on XML and output JATS XML & HTML - Familiar with many processing engines like Saxon (Java) - libxslt (C) - Python’s package - Upper-intermediate English - Available ASAP

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XML   10 yr.


XSLT   10 yr.

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Mohamed K., XSLT Developer

Cairo, Egypt
Last Updated: 15 Mar 2024
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- 12+ years of experience in IT - 10+ years of experience with XSLT - Writing, testing and maintaining the XSLT code that applies some filtration and conditions on XML - Converting IATA NDC Standard XML Content format into IATA NDC Standard XML format using XSLT - Familiar with many processing engines like Saxon (Java) - libxslt (C) - Python’s package - Upper-intermediate English - Available ASAP

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XSLT   10 yr.

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Ansari, XSLT Developer

Last Updated: 4 Jul 2023

- 10+ Years of experience in publishing industries with a leading organization and in achieving production and ensuring profitability and 5 Years working as “XSLT DEVELOPER”. - Well versed in project development lifecycle. - Have successfully completed many new & ongoing projects for large US & UK Clients. Publishers, Legal & Content Management firms. - Experience in XML Authoring, XSLT development and working with a variety of DTDs and Schemas. - Upper-Intermediate English - Available ASAP

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Mohamed T., XSLT Developer

Cairo, Egypt
Last Updated: 8 Aug 2023

- 8+ years of experience with XSLT/XML - Writing, testing and maintaining XSLT & Schematron code that apply some filtration, mapping and conditions on XML and validate the output XML - Converting IATA NDC Standard XML Content format into IATA NDC Standard XML format using XSLT - Familiar with many processing engines like Saxon (Java) - libxslt (C) - Python’s package - Upper-intermediate English - Available ASAP

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XSLT   8 yr.

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Anupama D., XSLT/XML/DTD/Schema Engineer

Sri Lanka
Last Updated: 4 Jul 2023

- Process Engineer. Involved in data conventions and content management projects. - 4 years of experience with XSLT - Upper-intermediate English

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XSLT   4 yr.



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Our journey starts with a 30-minute discovery call to explore your project challenges, technical needs, and team diversity. Meet Carefully Matched XSLT Talents. Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person. Validate Your Choice. Bring a new XSLT developer on board with a trial period to confirm that you’ve hired the right one. There are no termination fees or hidden costs.

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Upstaff Managers conduct an introductory round with potential candidates to assess their soft skills. Additionally, the talent’s hard skills are evaluated through testing or verification by a qualified developer during a technical interview. The Upstaff Staffing Platform stores data on past and present XSLT candidates. Upstaff managers also assess talent and facilitate rapid work and scalability, offering clients valuable insights into their talent pipeline. Additionally, we have a matching system within the platform that operates in real-time, facilitating efficient pairing of candidates with suitable positions.

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Table of Contents

Cases when XSLT does not work

  1. When the input XML document is invalid or not well-formed, XSLT may not work correctly. XML documents must adhere to certain rules and syntax for XSLT transformations to be successful.
  2. If the XSLT stylesheet is not properly written or contains errors, XSLT may fail to produce the desired output. It is important to ensure that the XSLT stylesheet is valid and correctly structured.
  3. XSLT may not work as expected when dealing with large XML documents or complex transformations. Performance issues can arise when processing extensive XML files, leading to slow or incomplete transformations.
  4. When the transformation logic requires complex branching or conditional processing, XSLT may not be the most suitable solution. Other programming languages or scripting tools may offer more flexibility and ease in handling such cases.
  5. In certain scenarios, when the transformation process involves dynamic changes or real-time updates to the XML data, XSLT alone may not be sufficient. Additional frameworks or tools may be required to handle the dynamic aspects effectively.
  6. If the XSLT processor being used does not fully support the version of XSLT used in the stylesheet, certain features or functionalities may not work as expected. It is important to ensure compatibility between the XSLT processor and the XSLT version being utilized.
  7. XSLT may not be suitable for transforming non-XML data formats. While XSLT is specifically designed for XML transformations, it may not be the ideal choice for converting data between different non-XML formats.
  8. In cases where the transformation requirements involve extensive data manipulation, calculations, or complex data operations, a more specialized language or tool may offer better capabilities and performance than XSLT.

TOP 10 XSLT Related Technologies

  • XML

    XML (eXtensible Markup Language) is a fundamental technology for XSLT software development. It provides a way to structure and store data in a human-readable format, making it easy to exchange information between different systems.

  • XSLT

    XSLT (eXtensible Stylesheet Language Transformations) is a powerful language used for transforming XML documents into different formats. It allows developers to define rules and templates to manipulate XML data and generate output in HTML, PDF, or other formats.

  • XPath

    XPath is a language used to navigate through XML documents and select specific elements or attributes. It is often used in conjunction with XSLT to define the source data for transformations.

  • XQuery

    XQuery is a query language designed for extracting and manipulating data from XML documents. It provides a flexible and expressive syntax for querying XML data, making it an essential tool for XSLT developers.

  • Saxon

    Saxon is a popular open-source XSLT and XQuery processor. It provides a robust implementation of the XSLT and XQuery standards and offers advanced features like streaming and parallel processing.

  • Altova XMLSpy

    XMLSpy is a comprehensive XML development tool that includes features for editing, validating, and transforming XML documents. It provides a visual XSLT designer and debugger, making it easier to create and test XSLT transformations.

  • Oxygen XML Editor

    Oxygen XML Editor is a professional XML development environment that supports XSLT development. It offers features like intelligent content completion, debugging, and profiling tools to streamline the XSLT development process.

Soft skills of a XSLT Developer

Soft skills are essential for a successful XSLT Developer, as they contribute to effective communication, collaboration, and problem-solving. Here are the soft skills required at different levels of expertise:


  • Attention to Detail: Ability to pay close attention to small details in XSLT code and identify any errors or inconsistencies.
  • Time Management: Efficiently manage time to meet project deadlines and prioritize tasks effectively.
  • Teamwork: Collaborate with other developers and team members to achieve project goals.
  • Adaptability: Quickly adapt to new technologies, tools, and project requirements.
  • Strong Communication: Clearly communicate ideas, issues, and solutions with team members and stakeholders.


  • Problem-Solving: Analyze complex problems and develop creative solutions using XSLT.
  • Critical Thinking: Apply logical reasoning to evaluate and improve XSLT code and performance.
  • Leadership: Take ownership of projects and guide junior developers in the team.
  • Mentoring: Share knowledge and provide guidance to junior developers.
  • Collaboration: Work effectively with cross-functional teams, stakeholders, and clients.
  • Adaptability: Adapt to changing project requirements and emerging technologies.
  • Effective Communication: Clearly articulate technical concepts to both technical and non-technical stakeholders.


  • Strategic Thinking: Develop long-term strategies and roadmaps for XSLT development.
  • Project Management: Oversee the entire development lifecycle and ensure successful project delivery.
  • Technical Expertise: Deep understanding and mastery of XSLT, XPath, and related technologies.
  • Innovation: Identify and implement innovative solutions to enhance XSLT development processes.
  • Team Leadership: Lead and mentor a team of developers, providing guidance and support.
  • Client Management: Effectively manage client relationships and expectations.
  • Quality Assurance: Implement rigorous testing and quality control processes.
  • Continuous Learning: Stay updated with the latest developments in XSLT and related technologies.

Expert/Team Lead

  • Strategic Planning: Develop and execute long-term strategies for XSLT development.
  • Technical Visionary: Provide technical vision and direction for the team and organization.
  • Project Management: Manage multiple complex projects concurrently, ensuring successful delivery.
  • Mentorship: Mentor and guide junior and mid-level developers, fostering their professional growth.
  • Collaboration: Foster a collaborative and inclusive work environment, encouraging knowledge sharing.
  • Influence: Effectively influence stakeholders and decision-makers to drive positive outcomes.
  • Thought Leadership: Contribute to industry forums, conferences, and publications.
  • Continuous Improvement: Drive process improvements and optimize XSLT development practices.
  • Client Engagement: Engage with clients to understand their requirements and provide innovative solutions.
  • Business Acumen: Understand the business context and align XSLT development with organizational goals.
  • Team Building: Build and nurture high-performing teams by recruiting and retaining top talent.

How and where is XSLT used?

Case NameCase Description
Transformation of XML to HTMLXSLT development allows for the transformation of XML data into HTML format. This is particularly useful when working with dynamic websites that require the presentation of XML data in a user-friendly and visually appealing manner. By applying XSLT templates to the XML data, developers can easily generate HTML output that can be rendered by web browsers.
Data Integration and TransformationXSLT development plays a crucial role in data integration and transformation scenarios. It enables developers to map and convert data from one XML schema to another, or even between different data formats such as XML to CSV or XML to JSON. This allows for seamless data interoperability between systems and simplifies the process of data migration and synchronization.
Generating ReportsWith XSLT development, developers can generate customized reports from XML data. XSLT provides powerful capabilities to extract and transform data, apply formatting rules, and generate printable reports in various formats such as PDF or DOC. This is particularly useful in business applications where generating dynamic reports based on XML data is a common requirement.
Web Scraping and Data ExtractionXSLT can be used for web scraping and data extraction tasks. By applying XSLT templates to HTML documents, developers can extract specific data elements and structure the extracted data into XML format. This allows for automated data extraction from websites, enabling tasks such as content aggregation, data mining, or building web-based APIs.
Content SyndicationXSLT development facilitates content syndication by transforming and repackaging XML content for distribution across different platforms and systems. By applying XSLT transformations, developers can adapt XML content to meet the requirements of different syndication formats or APIs, ensuring seamless content distribution and integration across multiple channels.

What are top XSLT instruments and tools?

  • Saxon: Saxon is a powerful XSLT and XQuery processor that has been widely used since its initial release in 2000. It is known for its excellent performance and compliance with the XSLT and XQuery standards. Saxon is available in both open-source and commercial editions, offering a range of features and capabilities for transforming XML documents.
  • Altova XMLSpy: XMLSpy is an integrated development environment (IDE) specifically designed for XML-related technologies, including XSLT. It offers a comprehensive set of tools for editing, debugging, and transforming XML and XSLT files. XMLSpy has a user-friendly interface and provides advanced features such as XPath auto-completion and XSLT code generation.
  • Oxygen XML Editor: Oxygen XML Editor is another popular tool for working with XSLT. It provides a complete set of features for XML development, including powerful XSLT editing and debugging capabilities. Oxygen XML Editor supports XSLT 1.0, 2.0, and 3.0, and offers features like intelligent content completion, XSLT profiling, and integration with version control systems.
  • Stylus Studio: Stylus Studio is an integrated development environment that supports XSLT development along with other XML technologies. It offers a visual XSLT designer, which allows users to visually create and modify XSLT stylesheets. Stylus Studio also provides a range of debugging and profiling tools to aid in XSLT development.
  • Exselt: Exselt is an open-source XSLT 3.0 processor that aims to provide improved performance and support for the latest XSLT standards. It focuses on optimizing XSLT execution and offers additional features like streaming, schema-awareness, and support for higher-order functions. Exselt is compatible with existing XSLT stylesheets and can be used as a drop-in replacement for other XSLT processors.
  • Xalan: Xalan is an open-source XSLT processor developed by the Apache Software Foundation. It has been around since the early 2000s and is widely used in various applications. Xalan supports XSLT 1.0 and provides a Java API for programmatically performing XSLT transformations. Although it may not have the latest features of XSLT 2.0 or 3.0, Xalan remains a reliable and widely adopted XSLT tool.
  • BaseX: BaseX is a lightweight and easy-to-use XML database and XQuery processor that also supports XSLT transformations. It provides a graphical user interface for managing XML data and performing XSLT transformations. BaseX is known for its simplicity and efficiency, making it a suitable choice for small to medium-sized projects.

Hard skills of a XSLT Developer

As an XSLT Developer, the hard skills required vary depending on the level of expertise and the role within a team. Here are the hard skills for each level:


  • Knowledge of XML and XSLT syntax: Familiarity with XML markup language and the XSLT transformation language.
  • XSLT Templates: Ability to create and manipulate XSLT templates to transform XML data.
  • XPath: Proficiency in using XPath expressions to navigate and select elements within XML documents.
  • Basic XML Schema knowledge: Understanding of XML Schema definitions to validate XML data.
  • Debugging and troubleshooting: Skills to identify and fix issues in XSLT transformations.


  • Advanced XSLT functions: Knowledge of advanced XSLT functions such as sorting, grouping, and aggregating data.
  • Performance optimization: Ability to optimize XSLT code for improved performance and efficiency.
  • Integration with other technologies: Experience in integrating XSLT with other technologies like databases or web services.
  • XSLT 2.0/3.0: Familiarity with the features and enhancements introduced in XSLT versions 2.0 and 3.0.
  • Version control: Proficiency in using version control systems to manage XSLT code.
  • Unit testing: Understanding of unit testing frameworks and practices for XSLT transformations.
  • Error handling: Skills to handle errors and exceptions in XSLT code.


  • Advanced XSLT patterns: Mastery of complex XSLT patterns and techniques for advanced data transformations.
  • Code refactoring: Ability to refactor and optimize existing XSLT code for maintainability and readability.
  • Design patterns: Knowledge of design patterns and best practices for XSLT development.
  • Performance tuning: Expertise in fine-tuning XSLT transformations for optimal performance.
  • Code review and mentoring: Experience in reviewing code and mentoring junior developers in XSLT development.
  • Advanced XML technologies: Familiarity with advanced XML technologies like XQuery and XML Schema languages.
  • Documentation and technical writing: Skills to document XSLT code and write technical specifications.
  • Problem-solving and critical thinking: Ability to analyze complex requirements and propose innovative solutions using XSLT.

Expert/Team Lead

  • Architecture design: Proficiency in designing scalable and modular XSLT architectures for large-scale projects.
  • Performance optimization strategies: Ability to develop and implement performance optimization strategies for XSLT transformations.
  • Team leadership: Experience in leading and managing a team of XSLT developers.
  • Project management: Skills to plan, coordinate, and execute XSLT development projects.
  • Client interaction: Ability to communicate effectively with clients and stakeholders to understand requirements and provide technical guidance.
  • Continuous learning: Commitment to staying updated with the latest advancements in XSLT and related technologies.
  • Quality assurance: Proficiency in implementing quality assurance processes to ensure the delivery of high-quality XSLT solutions.
  • Presentation and training: Ability to deliver presentations and conduct training sessions on XSLT development.
  • Enterprise integration: Experience in integrating XSLT solutions with enterprise systems and workflows.
  • Security considerations: Knowledge of security best practices when handling sensitive data in XSLT transformations.
  • Performance optimization: Expertise in optimizing XSLT code and performance tuning for complex transformations.

Pros & cons of XSLT

7 Pros of XSLT

  • XSLT is a powerful language for transforming XML documents into different formats. It provides a standardized way to manipulate and extract data from XML.
  • XSLT is platform-independent and can be used with any programming language that supports XML.
  • With XSLT, it is possible to separate the structure and content of XML documents from their presentation, allowing for easier maintenance and updates.
  • XSLT supports templates, which can be reused across multiple transformations, improving efficiency and reducing duplication of code.
  • By using XPath expressions, XSLT allows for precise selection and manipulation of XML data. This enables complex transformations and data extraction.
  • XSLT is widely supported and has a large community of developers, making it easier to find resources, libraries, and examples.
  • XSLT is extensible, allowing developers to create custom functions and modules to enhance its functionality.

7 Cons of XSLT

  • XSLT can be complex and difficult to learn for beginners, especially those without a strong background in XML and XPath.
  • Large transformations in XSLT can be memory-intensive and may not perform well with large XML documents.
  • Debugging XSLT can be challenging, as the language lacks robust debugging tools compared to traditional programming languages.
  • XSLT has limited support for handling non-XML data formats, which may require additional processing or integration with other tools.
  • Creating complex transformations in XSLT can result in verbose and hard-to-maintain code, especially when dealing with intricate conditional logic.
  • XSLT transformations can be CPU-intensive, impacting performance when dealing with high volumes of data or frequent transformations.
  • Although XSLT is widely supported, there may be variations in implementation across different XML processors, leading to compatibility issues.

TOP 11 Tech facts and history of creation and versions about XSLT Development

  • XSLT (Extensible Stylesheet Language Transformations) is a language used for transforming XML documents into various formats.
  • It was developed in 1998 by the World Wide Web Consortium (W3C) and is an integral part of the XML family of standards.
  • James Clark, a prominent figure in the development of XML, was the primary author of XSLT.
  • XSLT allows for the separation of presentation and content by defining transformation rules using XPath expressions.
  • Version 1.0 of XSLT was released in 1999, providing a powerful tool for XML document manipulation and conversion.
  • In 2007, XSLT 2.0 was introduced, bringing significant enhancements such as new data types, better support for grouping, and improved error handling.
  • XSLT 2.0 also introduced the concept of streaming, enabling the processing of large XML documents without loading the entire document into memory.
  • XSLT 3.0, released in 2017, further extended the capabilities of XSLT by introducing support for higher-order functions, improved handling of JSON data, and enhanced streaming capabilities.
  • The XSLT development community has created numerous open-source libraries and tools to facilitate XSLT transformations, such as Saxon, Xalan, and Altova XMLSpy.
  • XSLT has found wide adoption in various domains, including web development, document processing, and data integration.
  • With the rise of alternative technologies like XQuery and JSONPath, XSLT continues to evolve to meet the changing needs of XML transformation and data manipulation.

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