Errors:
Internal encoding declaration “windows-1252” disagrees with the actual encoding of the document (“utf-8”).
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “pics-label” for attribute “http-equiv” on element “meta”.
Element “input” is missing required attribute “alt”.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Bad element name “fb:share-button”: Code point “U+003A” is not allowed
Element “g:plusone” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “fb:like” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “SCADA Basics course using siemens WinnCC tutorial” for attribute “longdesc” on element “img”: Illegal character in path segment: space is not allowed.
The “longdesc” attribute on the “img” element is obsolete. Use a regular “a” element to link to the description.
Bad value “becoming a certified PLC expert” for attribute “longdesc” on element “img”: Illegal character in path segment: space is not allowed.
Bad value “70%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Malformed byte sequence: “ae”.
Bad value “12, 22, 46, 58” for attribute “coords” on element “area”: Expected a minus sign or a digit but saw “ ” instead.
Element “area” is missing required attribute “alt”.
Bad value “49, 23, 86, 58” for attribute “coords” on element “area”: Expected a minus sign or a digit but saw “ ” instead.
Bad value “87, 23, 124, 59” for attribute “coords” on element “area”: Expected a minus sign or a digit but saw “ ” instead.
Bad value “126, 24, 162, 58” for attribute “coords” on element “area”: Expected a minus sign or a digit but saw “ ” instead.
Bad value “164, 22, 201, 58” for attribute “coords” on element “area”: Expected a minus sign or a digit but saw “ ” instead.
Warnings:
Element name “fb:share-button” cannot be represented as XML 1.0.
Element name “g:plusone” cannot be represented as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Element name “fb:like” cannot be represented as XML 1.0.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
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