DFdiscover Release 5.11.0
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June 01 2026
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DFdiscover 2026 Version 5.11.0 adds new capabilities and improvements that make clinical data management more efficient, secure, and reliable. It builds on the strong foundation of recent updates while adding new capabilities for participant engagement and improving system security, stability, and usability.
Key features and enhancements in this release include:
ePRO Notification Configuration: DFdiscover now supports custom reminders for participants using the DFengage ePRO mobile app, configured through DFsetup, enabling custom notification content and timing, complete with multi-language support. These reminders are delivered through push notifications on the participant’s device.
Disable Edit Checks Setting in DFweb: Authorized users can now manually disable edit checks in DFweb via the Settings page, providing more control for specialized scenarios such as training and testing.
DFcollect Device Requirement Updates: DFcollect has received several stability & maintenance updates. This has resulted in updated device requirements: tablets must be running Android® 10 or later or iPadOS®/iOS® 16 or later to install DFcollect 5.11.
Optional, Region-Limited SMS Support for 2FA: System administrators now have the option to enable SMS on their DFdiscover server to enable delivery of security codes for 2FA via text message instead of email to specified users in supported regions. The default configuration supports SMS to North American phone numbers only, but servers can be configured with a different Azure SMS sender to support a different region.
Security Enhancements: Various improvements have been made to ensure the security of the system and your data, including enhanced messaging for connectivity issues in DFweb, improved protection against attacks via uploaded PDFs in DFweb, and ability for system administrators to control which servers can connect to an API instance.
Framework Upgrade: DFdiscover’s core application framework has been upgraded, improving long-term maintainability and positioning the software for ongoing performance and compatibility enhancements.
See New Features and Enhancements for details about release highlights. The complete listing of all changes by product area and type of change, including bug fixes, is available under All Updates. The release notes also provide information about any Known Issues in the current release as well as any Advance Notices for planned changes in upcoming releases.
DFdiscover 2026 Version 5.11.0 is a minor release in the DFdiscover 5.X family that started with DFdiscover 2018. DFdiscover version numbers have 3 components:
For example, 5.0.2 is the second patch to the 5.0.0 major release. 5.2.1 is the first patch to the 5.2.0 minor release.
DFdiscover 2026 Version 5.11.0 includes the following client applications:
DFexplore: desktop app for clinical data management (Windows, macOS)
DFsend: desktop app for submission of scanned paper CRFs (Windows, macOS)
Complete client application package (Windows, macOS):
DFweb: browser-based EDC app (no end user installation required)
DFcollect: tablet-based online/offline EDC app, available from Google Play on Android™ and from the App Store on iPadOS® and iOS®.
NOTE: If auto-update is enabled for DFcollect on the device of existing users, DFcollect will update automatically as new versions are released. If auto-update is disabled, users need to manually update DFcollect to use newer versions.
DFdiscover 2026 Version 5.11.0 includes updates to the DFdiscover, DFws API, and DFweb server applications as well.
DFnet updates these components on its hosted DFdiscover instances as part of the release, including multiple instances of DFweb and the DFdiscover DFws API. These are located in the USA, South Africa, Canada, Australia, and Europe, each with their own server name, DFweb URL, and DFws API URI.
For organizations hosting their own DFdiscover servers, the server installation packages for DFdiscover, DFws API, and DFweb are available as RPM files. DFdiscover report updates are also available from cdn.dfdiscover.com. Information for system administrators is provided in Server Upgrade.
Desktop and client-side tools are supported on Windows 11 and newer and macOS 10.14 (Mojave) and newer. We recommend keeping your operating system up to date.
DFweb Version 5.11.0 is supported on devices (desktops, laptops, tablets, smartphones) that run the following web browsers: - Chrome 71 and newer - Edge 79 and newer - Firefox 65 and newer - Opera 58 and newer - Safari 12.1 and newer
The minimum recommended screen width is 400 pixels, except for studies using CRFs with backgrounds, where the minimum recommended screen width is 800 pixels. To avoid horizontal scrolling with CRF backgrounds and eCRF tables in portrait orientation, the minimum recommended screen width is 1280 pixels.
DFcollect Version 5.11.0 requires a tablet device running Android™ 10 and newer or iOS®/iPadOS® 16 and newer. The application is designed and tested for use on tablet devices. Use on smartphones is not recommended, as some interface elements and functionality may not be fully accessible or may not display correctly on smaller displays.
For DFdiscover system administrators, refer to Server Upgrade, Supported Configurations.
We recommend all end users install version 5.11.0 of the client applications to take advantage of new features and fixes. However, after upgrading the DFdiscover server to 2026 Version 5.11.0, end users are not required to upgrade immediately as long as the study is configured in DFadmin to allow older versions to connect.
Both DFweb and DFcollect are designed for backwards compatibility with older DFdiscover server and API versions, however some new features are only available when connecting to a DFdiscover server and API Version 5.11.0 or later, as noted in the following chapter.
If any version of any client application will be used that does not match the DFdiscover server version, ensure that the master or study Version Strict setting is ‘All minor versions supported’ or ‘Minimum version supported’ in DFadmin. When ‘All minor versions’ is enabled, the following versions of client applications may be used with DFdiscover 2026 Version 5.11.0 server: 2019 5.2.1, 2020 5.3.2, 2021 5.4.0, 2022 5.5.1, 2023 5.6.0, 2023 5.7.0, 2024 5.8.0, 2024 5.9.0, and 2025 5.10.0.
DFsetup and DFadmin users should use the new desktop client versions after the DFdiscover server upgrade to take advantage of new features.
NOTE: Using older versions of DFsetup to make changes to a study that uses features added in later versions will result in losing that data. In DFsetup, users will be warned if setup is newer than the DFsetup version, and a notice appears if your DFsetup client app version is older or newer than the DFdiscover server version. Only study admins can save a newer setup to an older version.
When upgrading, review study role permissions to ensure new features are available users as intended. Permission requirements for API client applications are described in the respective user guides: DFweb User Guide, Permission Requirements and DFcollect User Guide, Permission Requirements.
This chapter describes the features and enhancements added to DFdiscover since the release of Version 5.10.0. See the next chapter, All Updates for a table listing all changes, including bug fixes.
A new configuration is available in DFsetup to define ePRO participant reminders for push notification delivery in DFengage mobile with custom notification content and timing. This feature enhances participant engagement and protocol compliance with timely reminders that align with study requirements.
All DFengage push notifications are now defined in the new ePRO Notifications configuration in DFsetup. Notifications may be defined for all visits or for specific visits, with timing based on specific clock times or relative offsets in days, hours, or minutes before or after the visit due or overdue date and time. Notification titles and messages may be customized and support placeholders for the study name and participant name. Translation is also supported for multi-language studies. All notification configuration changes are tracked in DFsetup history.
Two default generic notification definitions are automatically pre-populated in DFsetup and must be manually saved before notifications become active for a study. For existing studies using DFengage, after DFdiscover server & API upgrade to version 5.11, you must manually save the ePRO Notifications configuration in DFsetup in order for participants to continue receiving push notification reminders in DFengage 2.5.
WARNING: For studies upgrading from DFdiscover 5.10 or earlier, existing participants may stop receiving new and overdue reminders from DFengage mobile until the ePRO Notifications configuration is saved in DFsetup.
See Study Setup User Guide, ePRO Notifications and DFengage Setup and Admin Guide, Notification Configuration for details about configuring ePRO notifications. See DFengage Release Notes, Custom ePRO Push Notifications for more details about the related changes in DFengage.
The ePRO Notifications configured in DFsetup are currently used only for push notifications delivered through DFengage mobile. Participant reminders sent by email continue to use the templates defined in the DFmsgtemplates file and are sent using the DFeproreminders program.
This feature requires DFdiscover server and API version 5.11 or later and DFengage version 2.5 or later.
DFdiscover now provides a region-limited option to send text messages via SMS using Azure Communication Services, when enabled for the server. SMS messaging may be configured at the server level, with all studies and users on that server using the same, region-specific Azure SMS service and sender.
When enabled for a server, SMS is an option for delivering two-factor authentication (2FA) codes by text message instead of email. This is enabled by an administrator through the user-specific Send code by Azure SMS setting in the DFadmin User Profile. Phone numbers are required to be within the region supported by the server’s configuration, and must contain both the country code and area code (e.g., 1-555-1234567). System administrators should ensure appropriate policies and controls are in place when enabling SMS-based authentication.
If SMS 2FA is enabled for users with phone numbers outside the supported region, those users will not receive authentication codes and will be unable to log in. When SMS is enabled for a server, by default DFdiscover supports SMS delivery to phone numbers in North America (United States, Puerto Rico, and Canada) only. Individual servers may be configured differently, including by organizations hosting their own DFdiscover environment and using their own Azure SMS service.
Azure SMS is disabled by default and can only be enabled and configured by a system administrator in the DFedcservice configuration file. See System Administrator User Guide, Azure SMS Messaging for more details.
This feature requires DFdiscover server and API version 5.11 or later.
A new global setting is available in DFsetup to control which DFengage access links are available for a study in DFweb’s ePRO Management page: web, mobile, or both. This feature supports organizations deploying their own DFengage web instance and helps enforce the use of one mode or another for studies that require it.
Based on the DFsetup global setting ‘DFengage app usage’ available under the ePRO tab, DFweb provides the appropriate invitation and login links and QR codes. See Enhanced DFengage Access Link Options for the details.
Administrators can now use a new DFws API configuration to restrict which DFdiscover servers an API instance may connect to.
Configuring the DFWS_AUTHORIZED_SERVERS option in the dfws configuration file restricts API connections to the specified servers. Attempts to connect to any other server are rejected with the error message ‘Server name is not valid’. If this option is not set, the API maintains its previous behavior and permits connections to all DFdiscover servers.
DFWS_AUTHORIZED_SERVERS
This enhancement provides greater security and control for self-hosted environments.
For system administrators, DFdiscover now supports deployment behind an NGINX reverse proxy, which enables hosting DFweb, DFengage, and DFws under a single FQDN and port 443. Refer to the Nginx Configuration Guide for details about how to configure the reverse proxy.
The Ghostscript-based PDF and image conversion process has been replaced with a new implementation using the DFfile2image utility and modern Qt libraries, improving reliability and consistency when processing PDF and TIFF files to PNG. This resolves issues where certain PDFs (e.g., generated by Microsoft Print to PDF) were not processed correctly or were not received.
High definition imaging must be enabled on the server to take full advantage of this update. Standard definition PDFs and images processed on the server continue to use the legacy Ghostscript-based implementation to maintain consistent ICR behavior for image-based CRFs.
DFweb now includes a user setting to disable edit checks, helping reduce interruptions for users who are being introduced to a study or workflow.
The option ‘Disable edit checks’ is available on the DFweb Settings page and is set off by default. Users can manually turn the setting on if they have the appropriate role permission (‘DFexplore Miscellaneous: May disable edit checks’), but otherwise the setting is disabled. The setting is reset to off when the user logs out or switches to another study.
This setting is designed to align with the behavior of DFexplore when ‘Enable edit checks’ is unchecked when selecting the mode and save level, where interactive edit checks are not triggered while some system-level edit checks continue to run if defined.
When a task has been defined to run with edit checks enabled, note that in DFweb the edit checks may still be disabled due to the Disable Edit Checks setting. Ensure the Disable Edit Checks setting is off while running tasks.
DFweb has been enhanced to better detect and communicate connectivity issues when a user’s access to DFweb is impacted by their network blocking access to the DFws API, for example through firewall restrictions added by the IT department at a clinical site.
Previously, these users received a ‘No Study’ message after login, which created additional troubleshooting efforts to resolve. Now, users are notified immediately after login if the application cannot reach the API server, with clear messaging explaining the issue and guidance on how to resolve it. Users can copy & paste wording to share with their IT team directly, including a link providing more information in the DFweb User Guide.
This update improves the troubleshooting process for user issues connecting to DFweb. We recommend asking study team members to log in to DFweb as soon as their credentials are provided to test their DFweb access so that if site staff requires IT support to allow access, it can be completed before data entry begins.
DFweb now provides improved control over DFengage access links, ensuring invitation and login links consistently use the correct access links based on study requirements and supporting organizations deploying their own DFengage web instance.
Based on the new global setting in DFsetup (see DFsetup Global Setting for DFengage Access Link Types), DFweb provides access links for DFengage mobile, web, or both. Mobile access links use dfengage.dfdiscover.com, while web access links use the DFengage FQDN defined in the DFedcservice configuration file.
For studies using both, the “Get Link/QR Code” dialog in DFweb ePRO Management uses a tabbed interface to display mobile and web options separately. This update improves flexibility and usability for different study requirements and DFengage deployment scenarios.
A new check of uploaded PDF documents has been added to DFweb to enhance protection against cross-site scripting (XSS) attacks. When a user uploads a PDF with potentially unsafe content (including Javascript), DFweb will prevent the PDF from being displayed. The user will see a warning message indicating that the file cannot be displayed due to unsafe content.
This update strengthens DFdiscover security by preventing malicious scripting from being introduced through user-submitted data.
DFcollect on Android devices now requires Android 10 (API level 29) or higher, replacing the previous minimum of version 5. DFcollect on Apple devices now requires iPadOS or iOS 16 or later, replacing the previous minimum of version 11.
These updated device requirements provide alignment with modern platform security standards. Updates have been implemented to strengthen application security and protect app data, with no changes to user workflows.
Includes updates to the DFdiscover server, API, and desktop client tools.
This section provides information about low-severity, low-priority issues that exist in the current release, with details about available workarounds. Where possible, known issues are planned to be addressed in a future release.
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This section provides information about changes planned in a future release that may impact ongoing projects, in particular any features that will be deprecated. These notices are intended to support planning for future upgrades.
Internal Queries Behavior: Internal queries permission implementation will be updated in a future release. The implementation of the Show Internal Queries “none” and “resolved” options in the DFadmin role permissions will be updated in DFexplore, DFweb, and DFcollect to ensure consistency across apps. The following behavior will be implemented:
If internal queries permission is “none” and the role includes full permissions to modify queries, internal queries are view only.
Current behavior: In DFexplore, internal queries are treated the same as external queries. In DFweb and DFcollect, internal queries are hidden.
If internal queries permission is “none” and the role includes partial or no permissions to modify queries, internal queries are hidden. Internal queries can be created or modified by an edit check with partial query permissions, but the queries will remain hidden.
No change from current behavior.
If internal queries permission is “resolved” and the role includes full permissions to modify queries, outstanding internal queries are view only; resolved and pending internal queries are treated the same as external queries.
Current behavior: In DFexplore, DFweb, and DFcollect, all internal queries are treated the same as external queries.
If internal queries permission is “resolved” and the role includes partial or no permissions to modify queries, outstanding internal queries are hidden; resolved and pending internal queries are treated the same as external queries. Internal queries can be created or modified by an edit check with partial query permissions, but the queries will remain hidden when outstanding.
Current behavior: In DFexplore, all internal queries are shown and view only. In DFweb and DFcollect, all internal queries are hidden.
Edit Checks in View Only Mode: The behavior of edit checks on view-only data will be updated for consistency in a future release. Currently, when the ‘Run edit checks in view mode’ global setting in DFsetup is disabled, DFexplore/DFcollect and DFweb behave slightly differently:
DFexplore: Edit checks don’t run only when user is in ‘view mode’, which is enabled automatically for users who have only view-only permissions to all data but is not always enabled when the current page is view-only.
DFweb: Edit checks don’t run on a record any time the user has view-only/read only access to the data record for any reason (view mode, locked record, permissions).
DFcollect: Same as DFexplore.
This discrepancy will be addressed by updating DFexplore and DFcollect to match DFweb, so that if the ‘run edit checks in view mode’ setting is disabled, edit checks will not run whenever a plate is view-only (not just when user is in view mode).
Protus Fax Support: The Protus fax service is no longer supported in DFdiscover after MyFax sunsetted their API in 2021. The Protus functionality will be removed from DFadmin in a future release.
This section is applicable only to DFdiscover administrators hosting their own DFdiscover installation. This section outlines requirements and considerations for upgrading DFdiscover, DFws API, and DFweb to Version 5.11.0.
This release of DFdiscover is a complete release. It can be installed as a new install or as an upgrade of any previous release. Existing studies will continue to work in the updated installation.
See the Software Installation Guide for full details on upgrading your DFdiscover server as well as your DFws API, DFweb, and DFengage web server instances.
DFdiscover 2026 Version 5.11.0 includes updates to the DFdiscover server, DFws API, and DFweb server installation packages, as well as the DFengage web server installation package. These are available as RPM files from the DFnet website under My Account > Software Release (account required). DFdiscover reports are available from cdn.dfdiscover.com (see Update CDN_URL). The build dates for all software components are:
DFdiscover 2026 Version 5.11.0 is supported on Novell openSUSE version Leap 42.1 and newer, SUSE Tumbleweed and Redhat Enterprise Linux (CentOS) versions 8.X and 9.X. DFdiscover is a 64-bit server application and will not run on 32-bit systems. Other Linux distributions may work but are unsupported. Debian distributions such as Ubuntu will not work at this time. The same configurations are required for the DFws API and DFweb servers.
For clients managing their own DFdiscover server and API and/or DFweb instance, we recommend upgrading all three components at the same time to ensure all new features, enhancements, and bug fixes are available.
It is possible to upgrade the DFws API & DFweb without also upgrading the DFdiscover server, however please note that not all updates in Version 5.11.0 will be supported with an older DFdiscover server. See All Changes for notes about the features and changes that require DFdiscover server and/or API Version 5.11.0 or later.
If using mismatched DFdiscover versions, key considerations include:
Version Strict setting must be adjusted on the DFdiscover server (Master level and study level) to ensure access using newer client tools. See Verify version compatibility settings.
Changes made to the study setup using a newer version of DFsetup could be erased inadvertently if an older version of DFsetup is later used that doesn’t support the new features. DFsetup users are warned before downgrading the setup version applied to their study.
Newer versions of DFexplore and DFweb may not offer optimal performance when connecting to a mismatched server and/or API version.
The following section outlines potential upgrade steps required for DFdiscover administrators (and study administrators, as appropriate) when upgrading an existing DFdiscover release to Version 5.11.0. Refer to the Software Installation Guide for complete details on new and upgrade installations.
Required
To get the latest updates to the DFdiscover standard reports, the CDN_URL must be updated in DFadmin. The resources used to display the DFdiscover standard reports are specified in the value of CDN_URL in the system master configuration. To inspect and update the value:
Log in to DFadmin. Click the Master tab to display the master configuration panel.
Inspect the value specified for CDN_URL. If the value reads ‘https://cdn.dfdiscover.com/v5.11’, it is already up to date and no change is needed. Otherwise, update the value to read ‘https://cdn.dfdiscover.com/v5.11’.
Click Save to apply the change.
Required if upgrading from 5.4 or earlier
If upgrading from a DFdiscover version earlier than 5.5.0, existing journal files must be loaded into the new audit database for each study. DFauditdb is provided for this purpose. Until study journal files are loaded, it is not possible to view page or field history or run DF_SBhistory.
DF_SBhistory
Load the new audit trail database for all ongoing studies using this command as either user datafax or root:
/opt/dfdiscover/utils/DFauditdb -reload -s all
Required if upgrading from 5.9 or earlier
Existing user and role history must be loaded (or reloaded, if loaded with a previous upgrade) into the admin history database. DFadmindb is provided for this purpose. Until the admin history is loaded, it is not possible to view User, Role, or Study History in DFadmin. If previously loaded in an upgrade prior to 5.10, reloading is required to fix a bug with incorrect study access details.
/opt/dfdiscover/utils/DFadmindb -reload
Existing study schema history must be loaded (or reloaded, if loaded with a previous upgrade) into the new setup database. DFsetupdb is provided for this purpose. Until the setup database is loaded, it is not possible to view History in DFsetup. If previously loaded in an upgrade prior to 5.10, reloading is required to fix a bug with incorrect timestamps.
/opt/dfdiscover/utils/DFsetupdb -reload -s all
Required if upgrading from 5.8 or earlier and using DFcollect and/or DFengage
Starting with Version 5.9.0, DFengage and DFcollect are licensed features per server. If you are using DFengage and/or DFcollect, you will need a new license that includes the appropriate feature(s) when upgrading your server.
Required if upgrading from 5.10 or earlier and using DFengage mobile
For studies using DFengage mobile, a new notification configuration now handles DFengage push notifications and needs to be saved in DFsetup to activate notifications for the study. Studies requiring push notifications in French or Spanish must define the translations in DFsetup. See ePRO Notifications Configuration in DFsetup for details.
For users of API client tools (DFweb, DFcollect, DFengage, and DFsources), verify that the study roles are set up with the required permissions See Role Permission Considerations for details. Any DFweb, DFcollect, DFengage, or DFsources users may lose their access after upgrading if their roles are not updated to enable access.
The Version Strict setting in DFadmin allows you to control version compatibility. If users will be connecting to DFdiscover 2026 Version 5.11.0 using older versions of DFexplore, or if users will be connecting to an older version of DFdiscover through the latest DFweb, DFcollect, or API version, the Version Strict setting must be updated to allow this.
If any version of any client application will be used that does not match the DFdiscover server version, ensure that the master or study Version Strict setting is ‘All minor versions supported’ or ‘Minimum version supported’ in DFadmin.
When ‘All minor versions’ is enabled, the following versions of client applications may be used with DFdiscover 2026 Version 5.11.0 server: 2019 5.2.1, 2020 5.3.2, 2021 5.4.0, 2022 5.5.1, 2023 5.6.0, 2023 5.7.0, 2024 5.8.0, 2024 5.9.0, and 2025 5.10.0.
DFdiscover 2026 Version 5.11 is not compatible with DFcollect version 5.9.X or earlier. This is due to DFws API version 5.10 and later requiring TLS version 1.3 or later. Ensure all DFcollect users upgrade to version 5.10 or later on their devices. DFcollect 5.11 is recommended.
DFdiscover software uses several third-party software components as part of its server side and/or client tools.
The copyright information for each is provided below. If you would like to receive source codes of these third-party components, please send us your request at help@dfnetresearch.com.
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All advertising materials mentioning features or use of this software must display the following acknowledgment: "This product includes software developed by the OpenSSL Project for use in .the OpenSSL Toolkit." (https://www.openssl.org/)
The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to endorse or promote products derived from this software without prior written permission. For written permission, please contact openssl-core@openssl.org.
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THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
This product includes cryptographic software written by Eric Young (eay@cryptsoft.com). This product includes software written by Tim Hudson (tjh@cryptsoft.com).
Copyright© 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
This package is an SSL implementation written by Eric Young (eay@cryptsoft.com). The implementation was written so as to conform with Netscapes SSL.
This library is free for commercial and non-commercial use as long as the following conditions are aheared to. The following conditions apply to all code found in this distribution, be it the RC4, RSA, lhash, DES, etc., code; not just the SSL code. The SSL documentation included with this distribution is covered by the same copyright terms except that the holder is Tim Hudson (tjh@cryptsoft.com).
Copyright remains Eric Young's, and as such any Copyright notices in the code are not to be removed. If this package is used in a product, Eric Young should be given attribution as the author of the parts of the library used. This can be in the form of a textual message at program startup or in documentation (online or textual) provided with the package.
Redistributions of source code must retain the copyright notice, this list of conditions and the following disclaimer.
All advertising materials mentioning features or use of this software must display the following acknowledgement: "This product includes cryptographic software written by Eric Young (eay@cryptsoft.com)" The word "cryptographic" can be left out if the routines from the library being used are not cryptographic related :-).
If you include any Windows specific code (or a derivative thereof) from the apps directory (application code) you must include an acknowledgement: "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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The licence and distribution terms for any publically available version or derivative of this code cannot be changed. i.e. this code cannot simply be copied and put under another distribution licence [including the GNU Public Licence.]
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Copyright© 1989, 1991 Free Software Foundation, Inc.
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GPL Ghostscript contains an implementation of techniques covered by US Patents 5,055,942 and 5,917,614, and corresponding international patents. These patents are licensed for use with GPL Ghostscript under the following grant:
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5055942 Photographic image reproduction device using digital halftoning to para images allowing adjustable coarseness 5917614 Method and apparatus for error diffusion paraing of images with improved smoothness in highlight and shadow regions
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© Wang Bin wbsecg1@gmail.com Shanghai University->S3 Graphics->Deepin, Shanghai, China 2013-01-21
QtAV is free software licensed under the term of LGPL v2.1. The player example is licensed under GPL v3. If you use QtAV or its constituent libraries, you must adhere to the terms of the license in question.
Rather than repeating the text of the LGPL v2.1, the original text can be found in GNU LESSER GENERAL PUBLIC LICENSE, Version 2.1.
Most files in FFmpeg are under the GNU Lesser General Public License version 2.1 or later (LGPL v2.1+). Read the file `COPYING.LGPLv2.1` for details. Some other files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to FFmpeg.
The MIT License (MIT) © 2013 Masayuki Tanaka
Copyright© 2010-2017 Mike Bostock All rights reserved.
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Copyright © 2018 Dominik Thalhammer
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