Exporting to doc/docx format.

Question

Firstly, I've submitted the following to Apple as Pages feedback, however they will not feedback to me an explanation for the observations below, so I'm submitting this because someone else may have an explanation and confirmation.
Under Mavericks and Pages 5.0.1, Apple have made it harder to convert to doc/docx, since now you have to export to other formats, but when I do export a pages document to doc/docx format then the file size of the doc/docx documents are far smaller than in the pages format. For example, I have a pages document that is 332kb, and when I export it to doc/docx, those documents have sizes 19/12 kb. You might say that the pages document has macros, formatting information, etc, that the doc/docx forms don't, but the content looks the same, and when I re-save the doc/docx documents in pages format, they're both saved as 332kb documents.
Also, when displaying in doc/docx form, the filename displayed at the very top of the document in the title space has a .pages suffix instead of a .doc/.docx suffix - ok, they're pages documents compatible with Word formatting, but their name in Finder has the .doc/.docx suffix so it should be kept when displayed in the title space of the displayed document. The latter may be a bug, but the following is certainly a bug. The doc/docx documents I've been referring to have had the year 2013 as part of their filename - when these filenames are displayed in the title, the year is being treated as a formatted number, hence the 2013 is being displayed as 2,013 - I emphasise that this does not happen when the pages form of the document is displayed.

Answer 1

Dear fruhulda and Peter,
     Thanks for replying.
      fruhulda - your reply about the size would imply either that Pages carries with it a lot more features (and thus code) than Word, or that the coding of Pages is, in some way, less efficient than Word - and I don't think either of those is true. The discrepancy in file size is inexplicable, and I've found an article from which this quote opines the same: "That's right: the only way to handle documents in Pages is by saving your working documents as .pages files – which are, inexplicably, often 10 or more times larger than their Word .DOC equivalent – and then exporting .DOC versions as and when you need them." (http://www.zdnet.com/why-i-may-never-install-office-for-mac-again-7000023520/).  In fact, how does Apple get Pages not only to read and write Word files but also PDF files? I can only imagine that Apple have bought use of the relevant routines from Microsoft and Adobe, but the latter both keep a tight rein on their proprietary products. For instance, Office for Mac has, presumably, been developed by Microsoft since I can't find it for sale in the Apple Store. Hence, you may be right that Pages only saves documents in its own format, and documents in other formats call upon routines external to Pages. Regarding the suffix or extension being part of the filename, there's no reason for not including it as part of the file name since, for instance, X.doc is only distinguishable from X.docx by the suffix; and, for instance, http://en.wikipedia.org/wiki/8.3_filename includes the suffix when referring to the filename.
     Peter - first, thanks for the key combination, abling you to do something useful that I didn't know; and following are the results of that tip. The first image is the display of name of the .docx file in the title space of the document:
When I then click on the triangle, or if I save the document, I get the following: