Is a Mix of XHTML Strict and Transitional Pages OK?

Question about having both XHTML Strict and Transitional pages on a site

[hiddenboston]

I have a Web site whose pages are XHTML 1.0 Strict, and the vast majority of them are valid pages, according to the W3C validation page. Some of the pages are not valid, however, as I use some items such as target="_blank" and ol start="26" and items like that.

Would any problems develop with indexing (or with anything else) if I decided to make the invalid pages transitional and keep the rest strict? Is it ok to have a mix of XHTML 1.0 Strict and XHTML 1.0 Transitional on a single site?

[encyclo]

It will be no problem at all - the spider will evaluate each page rather than the site as a whole, and as long as you have clean functional HTML, the minor differences between the standards will be of no significance.

No spider actually reads the doctype or takes it into account when reading the page - the doctype is useful only for ensuring the correct rendering mode in the browser, as well as for the validation process.