The document describes the expda system, which is designed for real-time data sharing among Excel users in organizations, using a publish and subscribe approach. Expda facilitates seamless access to data from various internal sources and third-party providers, ensuring low latency and reliable connectivity through a comprehensive distributed network. It includes features for managing user permissions, restoring broken links, and providing a user-friendly data selection tool, making it a cost-effective solution at approximately $110 per user per month.

1. Derivative Trading Systems ExPDA Excel Publish and Subscribe Solution

2. Sharing real time data in Excel Excel users within many of today’s organisations need to share their “value added” information with other spreadsheet users, and … They need to be able to do it in REAL TIME, These same users also need real time access to data from other internal sources such as databases, web pages and other internal systems, Users may need to provide data to other Excel users, databases, web pages and other systems from their spreadsheets (“Publish”), They may need to share data with users at other sites around the globe, as well as with their local colleagues, Users may wish to publish value added data from their spreadsheets onto web pages for clients, customers or colleagues to view, BOTH Publishers and Subscribers also need a way to have seamless, easy to navigate access to the range of real time data being published, including 3 rd party real time data providers, internal Publishers and free static and real time data from sources like Yahoo Finance and Google.

3. Sharing real time data in Excel To achieve this goal requires a comprehensive and well designed infrastructure that is easy to manage. This is what ExPDA is designed to do.

4. DTS’s ExPDA Distribution Network ExPDA comprises a suite of components including: Real-time data feedhandlers, Real-time data forward handlers to co-ordinate the multiple publish/request instructions, Real-time data clients, Publish and subscribe facilities built into the Excel interface, A user friendly data selection and navigation tool that is used by both Publishers and Subscribers to configure and access the different data that is available on the system, A comprehensive administration module to control who gets access to what data and to log who is using what data for purposes of license compliance.

5. ExPDA Real Time Publish and Subscribe A comprehensive distributed peer to peer network system to meet the real time data sharing needs using Excel and built on DTS’s real-time data distribution protocol technology, Each user can be configured as either a Publisher or Subscriber (or both), The solution can be configured using an Excel Add-In or managed without an Add-In if required, The ExPDA protocol connects to the Distribution Network which is a set of servers that provide persistent caching, data management and data routing functionality as well as access to 3 rd party feeds.

6. ExPDA Publishing Platform The ExPDA system supports the following range of protocol modes: Full TCP based bi-directional streaming HTTP based Streaming HTTP Polling HTTP.  Plain Browser High High overhead HTTP Polling  Plain Browser Medium Some overhead HTTP Streaming  Plugin required Low Optimal TCP sockets ExPDA Browser Availability Network Availability Performance Method

7. ExPDA Publishing Platform The ExPDA Distribution Network servers connect with one another via a range of hierarchical TCP/IP socket connections to ensure reliable connectivity, and optimum delivery speed at minimal latency, This allows remote users to share data in Excel or between Excel and browser pages. Data can be published out over the Internet from one Excel user to another or from an Excel spreadsheet to (and from) a browser page, ExPDA Distribution Networks located at multiple sites can be connected with each other to enable managed data sharing between multiple locations or users and clients, Multi-site shared data is synchronised between connected servers. Multi-Site Data Sharing

8. ExPDA to Manage Excel Links ExPDA Helps Solve a Common Problem Links between Excel sheets often get broken ExPDA is an ideal solution to manage the problems associated with Excel links. Links are managed by the servers so any broken links are easily restored, Using ExPDA the last known value of a link is retained and available for use, but the recipient user is warned that the link may be stale, When large numbers of linked files are moved to a Sharepoint (for example), ExPDA will assist with eliminating the broken links

9. ExPDA Publishing Platform Users of the ExPDA Distribution Network can be configured as Publishers only, Subscribers only, or as both, Or, the ExPDA solution can be used just to access 3 rd party real time data, By default, all data published into the ExPDA Distribution Network is available to the entire network, HOWEVER , when required, specific Published data can be permissioned for specified groups or individual subscribers to access, In this way control is provided over which record sets are shared between different applications and specific spreadsheet users, and between sites in a multi-site deployment. Permissioning

10. Deployment Architecture

11. ExPDA Data Selection Tool Incorporated into ExPDA is a scaleable and easy to navigate Data Selection Tool that is used by Publishers to make the selection of their data easy to find and for Subscribers to make the selection of the many available Published feeds easy to use. This eliminates the need to remember complex feed names and their structure.

12. A Simple Deployment Example In the example shown here, real time FX market data is taken into an FX traders spreadsheet using ExPDA and after adjustment by the dealer for positions being carried, the adjusted data is published back to the FX sales team for execution. Here it is presented in a “Top of Book” format.

13. ExPDA Data Distribution Network An easy to navigate Data Selection Tool to make the selection of the Published data and 3 rd party data feeds as simple as possible, Share data between Excel users in real time as well as from Excel to web pages and other applications, ExPDA has been extensively tested in many environments and shown to be highly reliable and scaleable, It is a cost-effective publishing solution with minimum latency in the environment that it is designed to be used in, A highly flexible solution. With the addition of the Data Selection Tool it is very easy manage, The architecture will automatically change protocols depending on the network architecture to achieve the optimum distribution rate, Publish real time data from spreadsheets to web pages, as well as from web pages to spreadsheets simply and easily, Share real time data between multiple users and multiple sites efficiently and in a controlled manner, Configurable and controllable data loss in times of high throughput traffic, The cost of the ExPDA solution is as little as US$110 per user per month which includes ongoing upgrades and technical support. Key Features and Benefits

14. Questions … ExPDA Publishing Platform For more information, contact Derivative Trading Systems Ltd at www.derivs.com Email: enquiries@derivs.com Phone: London: +44 20 7689 6688 Sydney: +61 2 9980 8770