diff --git a/Nordic MathML Guidelines.md b/Nordic MathML Guidelines.md
index 90e00af..f04d3d8 100644
--- a/Nordic MathML Guidelines.md
+++ b/Nordic MathML Guidelines.md
@@ -10,28 +10,28 @@ The basis of this document is the [MathML Core specification](https://www.w3.org
## When To Use MathML
-In general, all mathematics should be marked up with MathML. Even simple arithmetic expressions such as 4 − 1 = 3, should be in MathML. Sometimes a mathematical expression is additional information, and the expression is placed inside parentheses. For consistency, always include the parentheses inside the MathML markup. For example, in the sentence “the price for three pairs of jeans was 90 euros (30 € × 3), and he paid for them in cash”, include the parentheses in the MathML markup.
+In general, all mathematics should be marked up with MathML. Even simple arithmetic expressions such as $4 − 1 = 3$, should be in MathML. Sometimes a mathematical expression is additional information, and the expression is placed inside parentheses. For consistency, always include the parentheses inside the MathML markup. For example, in the sentence “the price for three pairs of jeans was 90 euros $(30 € × 3)$, and he paid for them in cash”, include the parentheses in the MathML markup.
### Numbers and Numbers with Units
-Non-negative numbers, like 3 and 5.2, should be in plain text. If a number has a minus, like −4 or −3.1, it should be in MathML. If a number is part of a mathematical expression, it should be in MathML.
+Non-negative numbers, like 3 and 5.2, should be in plain text. If a number has a minus, like $−4$ or $−3.1$, it should be in MathML. If a number is part of a mathematical expression, it should be in MathML.
-Units should be in plain text, except if there is an exponent, division or Greek letter in it. For example, "10 m" should be in plain text, while "10 m/s2" should be in MathML.
+Units should be in plain text, except if there is an exponent, division or Greek letter in it. For example, 10 m should be in plain text, while $10 \hspace{0.25em} \text{m}/\text{s}^2$ should be in MathML.
### Variables, Parameters and Greek Letters
Variables and parameters should always be marked up with MathML.
-In STEM books Greek letters should always be in MathML. In these books they are variables and parameters. In non-STEM books isolated Greek letters should be in plain text. However, if they are part of an expression, like Δx, the whole expression should be marked up with MathML.
+In STEM books Greek letters should always be in MathML. In these books they are variables and parameters. In non-STEM books isolated Greek letters should be in plain text. However, if they are part of an expression, like $Δx$, the whole expression should be marked up with MathML.
-Variables, Greek letters etc. with a sign above, like $\bar{x}$ or $\hat{y}$, or with indexes, like β1 or ℇ0, should always be marked up with MathML, using “mover” and “msub” respectively. Note that there are distinct characters like ŷ (U+0177), but these are not intended for mathematics and should not be used.
+Variables, Greek letters etc. with a sign above, like $\bar{x}$ or $\hat{y}$, or with indexes, like $β_1$ or $ε_0$, should always be marked up with MathML, using “mover” and “msub” respectively. Note that there are distinct characters like ŷ (U+0177), but these are not intended for mathematics and should not be used.
### Some Things That Should Be In Plain Text
Things that are not mathematics should not be marked up with MathML. Below is a list with some examples. If it is unclear whether something is mathematics or not, please ask the Ordering Agency.
- Years: “The 1950s” (English), “1950-årene” (Norwegian)
-- Dates: “23.10.2013”, “23/10 - 13”
+- Dates: “23.10.2013”, “2013-10-23”
- Time periods: “1840–1845”, “June 1–June 4”
- Intervals like “7–8 children” (7 to 8 children), “90–95% of the participants voted yes”
- Numbers on journals etc: “Vi menn 1/2025”
@@ -45,7 +45,7 @@ Things that are not mathematics should not be marked up with MathML. Below is a
### Chemistry
-MathML markup is required to be used for all chemistry content in general. However, if the source material contains occasional occurrences of chemical substances written like CO2 or H2O, and no other type of chemistry notation, these can be captured using standard HTML. If MathML is used for other types of chemistry notation, then MathML must be used for all chemistry content in order to ensure a consistent output for the reader. How to mark up chemistry using MathML is explained here: [Chemistry](#chemistry-in-mathml).
+MathML markup is required to be used for all chemistry content in general. However, if the source material contains occasional occurrences of chemical substances written like $\text{C}\text{O}_2$ or $\text{H}_2\text{O}$, and no other type of chemistry notation, these can be captured using standard HTML. If MathML is used for other types of chemistry notation, then MathML must be used for all chemistry content in order to ensure a consistent output for the reader. How to mark up chemistry using MathML is explained here: [Chemistry](#chemistry-in-mathml).
## MathML Fundamentals
@@ -79,7 +79,7 @@ The Ordering Agency may decide if the `alttext` and `altimg` attributes should b
#### Block vs Inline
-Mathematical expressions can occur in three different ways:
+Mathematical expressions can occur in three different ways:
- as part of a sentence or paragraph as an inline element
- as part of a sentence or paragraph as a block element
@@ -87,7 +87,7 @@ Mathematical expressions can occur in three different ways:
The way in which a math expression is visually rendered is controlled by the `display` attribute of the `
```
+
The example will be rendered as follows:
Here is an inline equation: $x = 5.$
-**Note:** Make sure to have space between the normal text and the MathML markup.
+**Note:** Make sure to have space between the normal text and the MathML markup.
-It is common in STEM books for a mathematical expression to be part of a sentence or paragraph, yet displayed as a separate block element. In such examples it is important to place the `
```
-The example will be rendered as follows:
+
+The example will be rendered as follows:
To find the mean of a set of observations, add the values and divide by the number of observations:
-``` math
-\bar{x} = \frac{x_1 + x_2 + … + x_n}{n}
-```
-This can be written in more compact form:
-``` math
+
+$$
+\bar{x} = \frac{x_1 + x_2 + … + x_n}{n}.
+$$
+
+This can be written in more compact form:
+
+$$
\bar{x} = \frac{1}{n}∑x_i.
-```
+$$
-Other times the mathematical expression is a stand-alone element, not part of an ongoing sentence or paragraph. In such examples it is important to place the `