The presence of anchors in TOC entries (such as href="topic.htm#anchor") breaks Eclipse Help native breadcrumbs (Eclipse bug 184787), and possibly more. Therefore, by default DITA2Go omits these anchors. However, omitting the anchors also prevents mid-topic jumps from the TOC.
To enable mid-topic jumps by including anchors in Eclipse Help TOC entries:
[EclipseHelpOptions] ; TocNamesFileOnly = Yes (default, workaround for Eclipse bug 184787, ; and others, where use of #aname breaks Eclipse native breadcrumbs), ; or No (allows direct midtopic jumps to points within files). TocNamesFileOnly = No
When TocNamesFileOnly=Yes (the default), DITA2Go omits anchors from TOC entries, enabling Eclipse Help native breadcrumbs but disabling mid-topic jumps from the TOC.
When TocNamesFileOnly=No, DITA2Go includes anchors in TOC entries, enabling mid-topic jumps from the TOC, but disabling Eclipse Help native breadcrumbs.