Developer(s) | Extentech, Inc. |
---|---|
Stable release | Sheetster Version 1.4 / October 27, 2009 |
Preview release | 1.0 / January 27, 2009 |
Written in | Java, JSP and JavaScript |
Operating system | Cross-platform |
Type | Spreadsheet |
License | Professional Edition is commercial / proprietary, Community Edition is Apache v2 |
Website | www |
Sheetster is a GPL Open Source Web Spreadsheet and a Java Application Server created by Extentech Inc. The product was created for the enterprise and small and medium-sized businesses as an Open Source alternative to closed document management systems. [1]
A spreadsheet is an interactive computer application for organization, analysis and storage of data in tabular form. Spreadsheets developed as computerized analogs of paper accounting worksheets. The program operates on data entered in cells of a table. Each cell may contain either numeric or text data, or the results of formulas that automatically calculate and display a value based on the contents of other cells. A spreadsheet may also refer to one such electronic document.
Java is a set of computer software and specifications developed by James Gosling at Sun Microsystems, which was later acquired by the Oracle Corporation, that provides a system for developing application software and deploying it in a cross-platform computing environment. Java is used in a wide variety of computing platforms from embedded devices and mobile phones to enterprise servers and supercomputers. Java applets, which are less common than standalone Java applications, were commonly run in secure, sandboxed environments to provide many features of native applications through being embedded in HTML pages. It's still possible to run Java in web browsers after most of them having dropped support for Java's VM.
A document management system (DMS) is a system used to track, manage and store documents and reduce paper. Most are capable of keeping a record of the various versions created and modified by different users. The term has some overlap with the concepts of content management systems. It is often viewed as a component of enterprise content management (ECM) systems and related to digital asset management, document imaging, workflow systems and records management systems.
Built by Extentech Inc, a developer of Java spreadsheet and development tools, Sheetster BETA was made available to the public on June 8, 2007.
Sheetster runs on the ExtenXLS Java (programming language) Spreadsheet SDK and includes: [3]
ExtenXLS is a Java Excel Reporting Toolkit developed by Extentech. It is a Reporting API that allows for the reading in, modifying and creation of spreadsheet-based reports from Java applications.
Java is a general-purpose computer-programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere" (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of computer architecture. As of 2016, Java is one of the most popular programming languages in use, particularly for client-server web applications, with a reported 9 million developers. Java was originally developed by James Gosling at Sun Microsystems and released in 1995 as a core component of Sun Microsystems' Java platform. The language derives much of its original features from SmallTalk, with a syntax similar to C and C++, but it has fewer low-level facilities than either of them.
A software development kit is typically a set of software development tools that allows the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system, or similar development platform. To enrich applications with advanced functionalities, advertisements, push notifications, and more, most app developers implement specific software development kits. Some SDKs are critical for developing a platform-specific app. For example, the development of an Android app on Java platform requires a Java Development Kit, for iOS apps the iOS SDK, and for Universal Windows Platform the .NET Framework SDK. There are also SDKs that are installed in apps to provide analytics and data about application activity; prominent creators of these types of SDKs include Google, InMobi, and Facebook.
Sheetster Web Spreadsheet | ExtenXLS Java Spreadsheet SDK | Cellbinder Automation API | Spreadsheet Automation Server |
---|---|---|---|
Source Included/GPL | Customizable Java Swing GUI | REST API JSON/XML/HTML/CSV/XLS output | Object-Relational Mapper and Query Builder |
Document chat | Named ranges | Secure content management system | Embeddable live data charts |
Macros, forms, and gadgets for web 2.0 database applications | Excel 2007 compatibility | Data Mapping API | Collaboration, versioning, and access control [4] |
The Sheetster administration console allows for the design of relational data objects using a visual query designer and object-relational mapper. The RESTful API accepts data from a variety of sources, and outputs data-mapped spreadsheet objects in a variety of formats including JSON, XML, and as Excel-compatible XLS. Sheetster can be automated with macros and automatic data entry forms created from Excel cell ranges. Data Objects can be mapped to spreadsheet templates and output in a variety of formats: [5]
XSLT is a language for transforming XML documents into other XML documents, or other formats such as HTML for web pages, plain text or XSL Formatting Objects, which may subsequently be converted to other formats, such as PDF, PostScript and PNG. XSLT 1.0 is widely supported in modern web browsers.
Most common usages of sheetster:
Sheetster can be stored in any database or file system of choice, such as:
Integration is achieved through the RESTful API which allows for publishing of data-mapped spreadsheet cells as web services. Sheetster provides integrated support for:
Sheetster is available for download at Extentech.com and Sourceforge.
Enterprise information integration (EII) is the ability to support a unified view of data and information for an entire organization. In a data virtualization application of EII, a process of information integration, using data abstraction to provide a unified interface for viewing all the data within an organization, and a single set of structures and naming conventions to represent this data; the goal of EII is to get a large set of heterogeneous data sources to appear to a user or system as a single, homogeneous data source.
Representational State Transfer (REST) is a software architectural style that defines a set of constraints to be used for creating Web services. Web services that conform to the REST architectural style, termed RESTful Web services (RWS), provide interoperability between computer systems on the Internet. RESTful Web services allow the requesting systems to access and manipulate textual representations of Web resources by using a uniform and predefined set of stateless operations. Other kinds of Web services, such as SOAP Web services, expose their own arbitrary sets of operations.
eXist-db is an open source software project for NoSQL databases built on XML technology. It is classified as both a NoSQL document-oriented database system and a native XML database. Unlike most relational database management systems (RDBMS) and NoSQL databases, eXist-db provides XQuery and XSLT as its query and application programming languages.
In computing, JavaScript Object Notation (JSON) is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute–value pairs and array data types. It is a very common data format used for asynchronous browser–server communication, including as a replacement for XML in some AJAX-style systems.
Ajax is a set of Web development techniques using many web technologies on the client side to create asynchronous Web applications. With Ajax, web applications can send and retrieve data from a server asynchronously without interfering with the display and behavior of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows web pages, and by extension web applications, to change content dynamically without the need to reload the entire page. In practice, modern implementations commonly utilize JSON instead of XML due to the advantages of JSON being native to JavaScript.
A Web API is an application programming interface for either a web server or a web browser. It is a web development concept, usually limited to a web application's client-side, and thus usually does not include web server or browser implementation details such as SAPIs or APIs unless publicly accessible by a remote web application.
JAX-RS: Java API for RESTful Web Services (JAX-RS) is a Java programming language API spec that provides support in creating web services according to the Representational State Transfer (REST) architectural pattern. JAX-RS uses annotations, introduced in Java SE 5, to simplify the development and deployment of web service clients and endpoints.
Yahoo! Query Language (YQL) is an SQL-like query language created by Yahoo! as part of their Developer Network. YQL is designed to retrieve and manipulate data from APIs through a single Web interface, thus allowing mashups that enable developers to create their own applications.
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