Answers.Body: <p>An XML name must begin with a letter, underscore or colon (although in this case, the colon is prohibited).  </p>
  
  <p>See <a href="https://www.w3.org/TR/2000/REC-xml-20001006.html#sec-common-syn" rel="nofollow noreferrer">https://www.w3.org/TR/2000/REC-xml-20001006.html#sec-common-syn</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-06-02T23:05:40.327Z
Answers.Text: Now I get it - I think. id="13" doesn't work because it begins with a numeral. So all I have to do is add a letter or an underscore - id="a13" or id="_13". I'll give that a try. It's weird that neither Sigil nor Epub-Checker caught that.
Answers.UserDisplayName: WordBear
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-06-02T16:12:32.337Z
Answers.LastActivityDate: 2017-06-02T16:12:32.337Z
Answers.UserDisplayName: beaker
Body: <p>I tried submitting my first epub to iBooks and got this error:</p>
  
  <pre><code>ERROR ITMS-9000: "Shankle.epub: OEBPS/Text/introduction.xhtml(11): value of attribute "id" is invalid; must be an XML name without colons
  </code></pre>
  
  <p>Here's the code from introduction.xhtml, line 11:</p>
  
  <pre><code>&lt;p class="pfirst"&gt;&lt;span class="PageNumber" id="13"&gt;Page 13&lt;/span&gt; It is the purpose of this book to record the facts about the various state names. nicknames, flowers, trees, flags, birds, songs, seals, mottoes, capitol buildings, and some of the outstanding state histories.&lt;/p&gt;
  </code></pre>
  
  <p>I'm confused; there are no colons in my code. It's just <code>id="13"</code>. My epub shows no errors in Epub-Checker. Does anyone know what this error means?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-06-02T09:19:17.887Z
Comments.Text: Please note that there are formatting tools on the top bar of the editing window that let you write down raw code without being processed, so it will be displayed correctly.
Comments.UserDisplayName: Sekhemty
Tags: <epub><apple-books>
Title: iBooks ERROR ITMS-9000 - problem with id
UserDisplayName: WordBear
ThreadText: # iBooks ERROR ITMS-9000 - problem with id
  
  (Asked by: username_0 on 2017-06-02)
  
  I tried submitting my first epub to iBooks and got this error:
  ERROR ITMS-9000: "Shankle.epub: OEBPS/Text/introduction.xhtml(11): value of attribute "id" is invalid; must be an XML name without colons
  
  Here's the code from introduction.xhtml, line 11:
  Page 13 It is the purpose of this book to record the facts about the various state names. nicknames, flowers, trees, flags, birds, songs, seals, mottoes, capitol buildings, and some of the outstanding state histories.
  
  I'm confused; there are no colons in my code. It's just id="13". My epub shows no errors in Epub-Checker. Does anyone know what this error means?
  
  **Tags:** epub, apple-books
  
  > **Comments:**
  > **username_1**: Please note that there are formatting tools on the top bar of the editing window that let you write down raw code without being processed, so it will be displayed correctly.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2017-06-02. Score: 1 | Accepted answer
  
  An XML name must begin with a letter, underscore or colon (although in this case, the colon is prohibited).
  
  See <https://www.w3.org/TR/2000/REC-xml-20001006.html#sec-common-syn>
  
  > **Comments:**
  > **username_0**: Now I get it - I think. id="13" doesn't work because it begins with a numeral. So all I have to do is add a letter or an underscore - id="a13" or id="_13". I'll give that a try. It's weird that neither Sigil nor Epub-Checker caught that.  
  
  ---
  
  